21011000002 has 16 divisors (see below), whose sum is σ = 31924344672. Its totient is φ = 10370251360.

The previous prime is 21010999993. The next prime is 21011000051. The reversal of 21011000002 is 20000011012.

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, 114568 + ... + 234835.

It is an arithmetic number, because the mean of its divisors is an integer number (1995271542).

Almost surely, 2^21011000002 is an apocalyptic number.

21011000002 is a deficient number, since it is larger than the sum of its proper divisors (10913344670).

21011000002 is a wasteful number, since it uses less digits than its factorization.

21011000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349793.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21011000002 its reverse (20000011012), we get a palindrome (41011011014).

The spelling of 21011000002 in words is "twenty-one billion, eleven million, two", and thus it is an aban number and an uban number.