101111212120 has 64 divisors (see below), whose sum is σ = 242325276480. Its totient is φ = 37837418496.

The previous prime is 101111212099. The next prime is 101111212121. The reversal of 101111212120 is 21212111101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 101111212120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331629 + ... + 558748.

It is an arithmetic number, because the mean of its divisors is an integer number (3786332445).

Almost surely, 2^101111212120 is an apocalyptic number.

101111212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111212120 is an abundant number, since it is smaller than the sum of its proper divisors (141214064360).

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

101111212120 is a wasteful number, since it uses less digits than its factorization.

101111212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890572 (or 890568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101111212120 its reverse (21212111101), we get a palindrome (122323323221).

The spelling of 101111212120 in words is "one hundred one billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty".