21021101102210 has 64 divisors (see below), whose sum is σ = 42568654464000. Its totient is φ = 7408638955200.

The previous prime is 21021101102203. The next prime is 21021101102219. The reversal of 21021101102210 is 1220110112012.

It is a super-3 number, since 3×21021101102210³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21021101102219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22349060 + ... + 23270639.

It is an arithmetic number, because the mean of its divisors is an integer number (665135226000).

Almost surely, 2^{21021101102210} is an apocalyptic number.

21021101102210 is an abundant number, since it is smaller than the sum of its proper divisors (21547553361790).

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

21021101102210 is a wasteful number, since it uses less digits than its factorization.

21021101102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45619847.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021101102210 its reverse (1220110112012), we get a palindrome (22241211214222).

The spelling of 21021101102210 in words is "twenty-one trillion, twenty-one billion, one hundred one million, one hundred two thousand, two hundred ten".