21200012100202 has 32 divisors (see below), whose sum is σ = 37103925241152. Its totient is φ = 8994890951424.

The previous prime is 21200012100193. The next prime is 21200012100209. The reversal of 21200012100202 is 20200121000212.

It is a happy number.

It is a super-2 number, since 2×21200012100202² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (21200012100209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557699928 + ... + 557737939.

It is an arithmetic number, because the mean of its divisors is an integer number (1159497663786).

Almost surely, 2^{21200012100202} is an apocalyptic number.

21200012100202 is a deficient number, since it is larger than the sum of its proper divisors (15903913140950).

21200012100202 is a wasteful number, since it uses less digits than its factorization.

21200012100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115437942.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21200012100202 its reverse (20200121000212), we get a palindrome (41400133100414).

The spelling of 21200012100202 in words is "twenty-one trillion, two hundred billion, twelve million, one hundred thousand, two hundred two".