21122020210210 has 32 divisors (see below), whose sum is σ = 39330949939200. Its totient is φ = 8157409391040.

The previous prime is 21122020210169. The next prime is 21122020210279. The reversal of 21122020210210 is 1201202022112.

It is a happy number.

It is a super-2 number, since 2×21122020210210² (a number of 27 digits) contains 22 as substring.

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, 75678015 + ... + 75956605.

It is an arithmetic number, because the mean of its divisors is an integer number (1229092185600).

Almost surely, 2^{21122020210210} is an apocalyptic number.

21122020210210 is a deficient number, since it is larger than the sum of its proper divisors (18208929728990).

21122020210210 is a wasteful number, since it uses less digits than its factorization.

21122020210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540066.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122020210210 its reverse (1201202022112), we get a palindrome (22323222232322).

The spelling of 21122020210210 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, two hundred ten thousand, two hundred ten".