20113221121320 has 64 divisors (see below), whose sum is σ = 62963126997120. Its totient is φ = 5130328865024.

The previous prime is 20113221121313. The next prime is 20113221121321. The reversal of 20113221121320 is 2312112231102.

It is a super-2 number, since 2×20113221121320² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20113221121321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3643696719 + ... + 3643702238.

It is an arithmetic number, because the mean of its divisors is an integer number (983798859330).

Almost surely, 2^{20113221121320} is an apocalyptic number.

20113221121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113221121320 is an abundant number, since it is smaller than the sum of its proper divisors (42849905875800).

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

20113221121320 is a wasteful number, since it uses less digits than its factorization.

20113221121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287398994 (or 7287398990 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20113221121320 its reverse (2312112231102), we get a palindrome (22425333352422).

The spelling of 20113221121320 in words is "twenty trillion, one hundred thirteen billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty".