20220121131 has 16 divisors (see below), whose sum is σ = 30971265024. Its totient is φ = 11494485504.

The previous prime is 20220121091. The next prime is 20220121133. The reversal of 20220121131 is 13112102202.

It is not a de Polignac number, because 20220121131 - 2¹¹ = 20220119083 is a prime.

It is a super-2 number, since 2×20220121131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20220121131.

It is not an unprimeable number, because it can be changed into a prime (20220121133) 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, 2490411 + ... + 2498516.

It is an arithmetic number, because the mean of its divisors is an integer number (1935704064).

Almost surely, 2^20220121131 is an apocalyptic number.

20220121131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20220121131 is a deficient number, since it is larger than the sum of its proper divisors (10751143893).

20220121131 is a wasteful number, since it uses less digits than its factorization.

20220121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989130.

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

Adding to 20220121131 its reverse (13112102202), we get a palindrome (33332223333).

The spelling of 20220121131 in words is "twenty billion, two hundred twenty million, one hundred twenty-one thousand, one hundred thirty-one".