212120203131 has 96 divisors (see below), whose sum is σ = 327602620800. Its totient is φ = 132067584000.

The previous prime is 212120203093. The next prime is 212120203157. The reversal of 212120203131 is 131302021212.

212120203131 is a `hidden beast` number, since 212 + 120 + 20 + 313 + 1 = 666.

It is not a de Polignac number, because 212120203131 - 2⁶ = 212120203067 is a prime.

It is a super-2 number, since 2×212120203131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212120203171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 274411261 + ... + 274412033.

It is an arithmetic number, because the mean of its divisors is an integer number (3412527300).

Almost surely, 2^212120203131 is an apocalyptic number.

212120203131 is a deficient number, since it is larger than the sum of its proper divisors (115482417669).

212120203131 is a wasteful number, since it uses less digits than its factorization.

212120203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212120203131 its reverse (131302021212), we get a palindrome (343422224343).

The spelling of 212120203131 in words is "two hundred twelve billion, one hundred twenty million, two hundred three thousand, one hundred thirty-one".