21122101020210 has 64 divisors (see below), whose sum is σ = 53247399874560. Its totient is φ = 5351986411200.

The previous prime is 21122101020193. The next prime is 21122101020221. The reversal of 21122101020210 is 1202010122112.

It is a super-2 number, since 2×21122101020210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21122101020210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101259190 + ... + 101467569.

It is an arithmetic number, because the mean of its divisors is an integer number (831990623040).

Almost surely, 2^{21122101020210} is an apocalyptic number.

21122101020210 is an abundant number, since it is smaller than the sum of its proper divisors (32125298854350).

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

21122101020210 is a wasteful number, since it uses less digits than its factorization.

21122101020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202726943.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122101020210 its reverse (1202010122112), we get a palindrome (22324111142322).

The spelling of 21122101020210 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred one million, twenty thousand, two hundred ten".