100021111002 has 12 divisors (see below), whose sum is σ = 216712407210. Its totient is φ = 33340370328.

The previous prime is 100021110991. The next prime is 100021111049. The reversal of 100021111002 is 200111120001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56515077441 + 43506033561 = 237729^2 + 208581^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2778364177 + ... + 2778364212.

Almost surely, 2^100021111002 is an apocalyptic number.

100021111002 is an abundant number, since it is smaller than the sum of its proper divisors (116691296208).

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

100021111002 is a wasteful number, since it uses less digits than its factorization.

100021111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556728397 (or 5556728394 counting only the distinct ones).

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

Adding to 100021111002 its reverse (200111120001), we get a palindrome (300132231003).

The spelling of 100021111002 in words is "one hundred billion, twenty-one million, one hundred eleven thousand, two".