111211220210100 has 72 divisors (see below), whose sum is σ = 321862055030880. Its totient is φ = 29647945246080.

The previous prime is 111211220210087. The next prime is 111211220210113. The reversal of 111211220210100 is 1012022112111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111211220210087) and next prime (111211220210113).

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 111211220210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51312427 + ... + 53435826.

Almost surely, 2^{111211220210100} is an apocalyptic number.

111211220210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211220210100 is an abundant number, since it is smaller than the sum of its proper divisors (210650834820780).

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

111211220210100 is a wasteful number, since it uses less digits than its factorization.

111211220210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104751809 (or 104751802 counting only the distinct ones).

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

Adding to 111211220210100 its reverse (1012022112111), we get a palindrome (112223242322211).

The spelling of 111211220210100 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred".