20125220211 has 24 divisors (see below), whose sum is σ = 31495566960. Its totient is φ = 12333920256.

The previous prime is 20125220201. The next prime is 20125220263. The reversal of 20125220211 is 11202252102.

20125220211 is a `hidden beast` number, since 201 + 252 + 2 + 0 + 211 = 666.

It is not a de Polignac number, because 20125220211 - 2¹⁰ = 20125219187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20125220201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1522926 + ... + 1536083.

It is an arithmetic number, because the mean of its divisors is an integer number (1312315290).

Almost surely, 2^20125220211 is an apocalyptic number.

20125220211 is a deficient number, since it is larger than the sum of its proper divisors (11370346749).

20125220211 is a wasteful number, since it uses less digits than its factorization.

20125220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059075 (or 3059072 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 20125220211 its reverse (11202252102), we get a palindrome (31327472313).

The spelling of 20125220211 in words is "twenty billion, one hundred twenty-five million, two hundred twenty thousand, two hundred eleven".