21111022002 has 16 divisors (see below), whose sum is σ = 48253764672. Its totient is φ = 6031720560.

The previous prime is 21111021977. The next prime is 21111022013. The reversal of 21111022002 is 20022011112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251321649 + ... + 251321732.

It is an arithmetic number, because the mean of its divisors is an integer number (3015860292).

Almost surely, 2^21111022002 is an apocalyptic number.

21111022002 is an abundant number, since it is smaller than the sum of its proper divisors (27142742670).

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

21111022002 is a wasteful number, since it uses less digits than its factorization.

21111022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502643393.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21111022002 its reverse (20022011112), we get a palindrome (41133033114).

The spelling of 21111022002 in words is "twenty-one billion, one hundred eleven million, twenty-two thousand, two".