20125612221 has 16 divisors (see below), whose sum is σ = 31525435200. Its totient is φ = 11259083520.

The previous prime is 20125612201. The next prime is 20125612229. The reversal of 20125612221 is 12221652102.

It is not a de Polignac number, because 20125612221 - 2¹⁹ = 20125087933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20125612191 and 20125612200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125612229) 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, 23455996 + ... + 23456853.

It is an arithmetic number, because the mean of its divisors is an integer number (1970339700).

Almost surely, 2^20125612221 is an apocalyptic number.

It is an amenable number.

20125612221 is a deficient number, since it is larger than the sum of its proper divisors (11399822979).

20125612221 is a wasteful number, since it uses less digits than its factorization.

20125612221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46912876.

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 20125612221 in words is "twenty billion, one hundred twenty-five million, six hundred twelve thousand, two hundred twenty-one".