111221010102 has 32 divisors (see below), whose sum is σ = 228474779904. Its totient is φ = 36068392800.

The previous prime is 111221010097. The next prime is 111221010133. The reversal of 111221010102 is 201010122111.

It is a super-2 number, since 2×111221010102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064727 + ... + 4091997.

It is an arithmetic number, because the mean of its divisors is an integer number (7139836872).

Almost surely, 2^111221010102 is an apocalyptic number.

111221010102 is an abundant number, since it is smaller than the sum of its proper divisors (117253769802).

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

111221010102 is a wasteful number, since it uses less digits than its factorization.

111221010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45684.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111221010102 its reverse (201010122111), we get a palindrome (312231132213).

The spelling of 111221010102 in words is "one hundred eleven billion, two hundred twenty-one million, ten thousand, one hundred two".