102111111101220 has 192 divisors, whose sum is σ = 323821276692480. Its totient is φ = 23852905477632.

The previous prime is 102111111101203. The next prime is 102111111101221. The reversal of 102111111101220 is 22101111111201.

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 102111111101220.

It is not an unprimeable number, because it can be changed into a prime (102111111101221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20130330 + ... + 24687089.

It is an arithmetic number, because the mean of its divisors is an integer number (1686569149440).

Almost surely, 2^{102111111101220} is an apocalyptic number.

102111111101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111111101220 is an abundant number, since it is smaller than the sum of its proper divisors (221710165591260).

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

102111111101220 is a wasteful number, since it uses less digits than its factorization.

102111111101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44817594 (or 44817592 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 102111111101220 its reverse (22101111111201), we get a palindrome (124212222212421).

The spelling of 102111111101220 in words is "one hundred two trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, two hundred twenty".