21321100200010 has 32 divisors (see below), whose sum is σ = 41333943606480. Its totient is φ = 7871680339968.

The previous prime is 21321100199941. The next prime is 21321100200097. The reversal of 21321100200010 is 1000200112312.

It can be written as a sum of positive squares in 8 ways, for example, as 8641383382129 + 12679716817881 = 2939623^2 + 3560859^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6145015 + ... + 8966794.

Almost surely, 2^{21321100200010} is an apocalyptic number.

21321100200010 is a deficient number, since it is larger than the sum of its proper divisors (20012843406470).

21321100200010 is a wasteful number, since it uses less digits than its factorization.

21321100200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15122682.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21321100200010 its reverse (1000200112312), we get a palindrome (22321300312322).

The spelling of 21321100200010 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred million, two hundred thousand, ten".