111021642102 has 24 divisors (see below), whose sum is σ = 258295249656. Its totient is φ = 31720469088.

The previous prime is 111021642097. The next prime is 111021642157. The reversal of 111021642102 is 201246120111.

It is a super-3 number, since 3×111021642102³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188812023 + ... + 188812610.

It is an arithmetic number, because the mean of its divisors is an integer number (10762302069).

Almost surely, 2^111021642102 is an apocalyptic number.

111021642102 is an abundant number, since it is smaller than the sum of its proper divisors (147273607554).

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

111021642102 is a wasteful number, since it uses less digits than its factorization.

111021642102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377624652 (or 377624645 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 111021642102 its reverse (201246120111), we get a palindrome (312267762213).

The spelling of 111021642102 in words is "one hundred eleven billion, twenty-one million, six hundred forty-two thousand, one hundred two".