21101202020210 has 32 divisors (see below), whose sum is σ = 40917499367472. Its totient is φ = 7788616704000.

The previous prime is 21101202020191. The next prime is 21101202020267. The reversal of 21101202020210 is 1202020210112.

It can be written as a sum of positive squares in 8 ways, for example, as 9276331129849 + 11824870890361 = 3045707^2 + 3438731^2 .

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, 26653679 + ... + 27433938.

Almost surely, 2^{21101202020210} is an apocalyptic number.

21101202020210 is a deficient number, since it is larger than the sum of its proper divisors (19816297347262).

21101202020210 is a wasteful number, since it uses less digits than its factorization.

21101202020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54090638.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101202020210 its reverse (1202020210112), we get a palindrome (22303222230322).

The spelling of 21101202020210 in words is "twenty-one trillion, one hundred one billion, two hundred two million, twenty thousand, two hundred ten".