20123440222131 has 12 divisors (see below), whose sum is σ = 29067919486008. Its totient is φ = 13415290789824.

The previous prime is 20123440222121. The next prime is 20123440222187. The reversal of 20123440222131 is 13122204432102.

20123440222131 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 3 + 4 + 402 + 221 + 31 = 666.

It is not a de Polignac number, because 20123440222131 - 2⁵ = 20123440222099 is a prime.

It is a super-2 number, since 2×20123440222131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123440222095 and 20123440222104.

It is not an unprimeable number, because it can be changed into a prime (20123440222111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27622525 + ... + 28341678.

It is an arithmetic number, because the mean of its divisors is an integer number (2422326623834).

Almost surely, 2^{20123440222131} is an apocalyptic number.

20123440222131 is a deficient number, since it is larger than the sum of its proper divisors (8944479263877).

20123440222131 is a wasteful number, since it uses less digits than its factorization.

20123440222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56004162 (or 56004159 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20123440222131 its reverse (13122204432102), we get a palindrome (33245644654233).

The spelling of 20123440222131 in words is "twenty trillion, one hundred twenty-three billion, four hundred forty million, two hundred twenty-two thousand, one hundred thirty-one".