20112032310561 has 6 divisors (see below), whose sum is σ = 29050713337490. Its totient is φ = 13408021540368.

The previous prime is 20112032310541. The next prime is 20112032310569. The reversal of 20112032310561 is 16501323021102.

20112032310561 is a `hidden beast` number, since 20 + 1 + 1 + 20 + 32 + 31 + 0 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19978620365025 + 133411945536 = 4469745^2 + 365256^2 .

It is not a de Polignac number, because 20112032310561 - 2⁶ = 20112032310497 is a prime.

It is a super-2 number, since 2×20112032310561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112032310569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117335128356 + ... + 1117335128373.

Almost surely, 2^{20112032310561} is an apocalyptic number.

It is an amenable number.

20112032310561 is a deficient number, since it is larger than the sum of its proper divisors (8938681026929).

20112032310561 is a wasteful number, since it uses less digits than its factorization.

20112032310561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234670256735 (or 2234670256732 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 20112032310561 its reverse (16501323021102), we get a palindrome (36613355331663).

The spelling of 20112032310561 in words is "twenty trillion, one hundred twelve billion, thirty-two million, three hundred ten thousand, five hundred sixty-one".