111121010202120 has 128 divisors (see below), whose sum is σ = 334839662524800. Its totient is φ = 29501250840576.

The previous prime is 111121010202119. The next prime is 111121010202121. The reversal of 111121010202120 is 21202010121111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111121010202119) and next prime (111121010202121).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111121010202120.

It is not an unprimeable number, because it can be changed into a prime (111121010202121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28081596 + ... + 31793364.

It is an arithmetic number, because the mean of its divisors is an integer number (2615934863475).

Almost surely, 2^{111121010202120} is an apocalyptic number.

111121010202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111121010202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167419831262400).

111121010202120 is an abundant number, since it is smaller than the sum of its proper divisors (223718652322680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111121010202120 is a wasteful number, since it uses less digits than its factorization.

111121010202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712887 (or 3712883 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111121010202120 its reverse (21202010121111), we get a palindrome (132323020323231).

The spelling of 111121010202120 in words is "one hundred eleven trillion, one hundred twenty-one billion, ten million, two hundred two thousand, one hundred twenty".