212125113531531 has 32 divisors (see below), whose sum is σ = 316016194843200. Its totient is φ = 140627701428480.

The previous prime is 212125113531511. The next prime is 212125113531673. The reversal of 212125113531531 is 135135311521212.

212125113531531 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 2 + 5 + 113 + 5 + 3 + 1 + 531 = 666.

It is not a de Polignac number, because 212125113531531 - 2¹⁹ = 212125113007243 is a prime.

It is a super-2 number, since 2×212125113531531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212125113531511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15817666 + ... + 25970151.

It is an arithmetic number, because the mean of its divisors is an integer number (9875506088850).

Almost surely, 2^{212125113531531} is an apocalyptic number.

212125113531531 is a deficient number, since it is larger than the sum of its proper divisors (103891081311669).

212125113531531 is a wasteful number, since it uses less digits than its factorization.

212125113531531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41788876 (or 41788870 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The spelling of 212125113531531 in words is "two hundred twelve trillion, one hundred twenty-five billion, one hundred thirteen million, five hundred thirty-one thousand, five hundred thirty-one".