111100021002 has 24 divisors (see below), whose sum is σ = 240726447936. Its totient is φ = 37031842536.

The previous prime is 111100020991. The next prime is 111100021007. The reversal of 111100021002 is 200120001111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111100021007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389983 + ... + 611789.

It is an arithmetic number, because the mean of its divisors is an integer number (10030268664).

Almost surely, 2^111100021002 is an apocalyptic number.

111100021002 is an abundant number, since it is smaller than the sum of its proper divisors (129626426934).

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

111100021002 is a wasteful number, since it uses less digits than its factorization.

111100021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249642 (or 249639 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111100021002 its reverse (200120001111), we get a palindrome (311220022113).

The spelling of 111100021002 in words is "one hundred eleven billion, one hundred million, twenty-one thousand, two".