21020104002 has 16 divisors (see below), whose sum is σ = 44513161632. Its totient is φ = 6594542400.

The previous prime is 21020103977. The next prime is 21020104031. The reversal of 21020104002 is 20040102012.

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, 103039624 + ... + 103039827.

It is an arithmetic number, because the mean of its divisors is an integer number (2782072602).

Almost surely, 2^21020104002 is an apocalyptic number.

21020104002 is an abundant number, since it is smaller than the sum of its proper divisors (23493057630).

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

21020104002 is a wasteful number, since it uses less digits than its factorization.

21020104002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206079473.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21020104002 its reverse (20040102012), we get a palindrome (41060206014).

It can be divided in two parts, 2102010 and 4002, that added together give a palindrome (2106012).

The spelling of 21020104002 in words is "twenty-one billion, twenty million, one hundred four thousand, two".