20212121310 has 32 divisors (see below), whose sum is σ = 48962454912. Its totient is φ = 5339525280.

The previous prime is 20212121297. The next prime is 20212121339. The reversal of 20212121310 is 1312121202.

It is a super-2 number, since 2×20212121310² (a number of 21 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 20212121310.

It is a congruent number.

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, 3145096 + ... + 3151515.

It is an arithmetic number, because the mean of its divisors is an integer number (1530076716).

Almost surely, 2^20212121310 is an apocalyptic number.

20212121310 is an abundant number, since it is smaller than the sum of its proper divisors (28750333602).

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

20212121310 is a wasteful number, since it uses less digits than its factorization.

20212121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296728.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20212121310 its reverse (1312121202), we get a palindrome (21524242512).

The spelling of 20212121310 in words is "twenty billion, two hundred twelve million, one hundred twenty-one thousand, three hundred ten".