212311231101972 has 36 divisors (see below), whose sum is σ = 536724018806976. Its totient is φ = 70764027045840.

The previous prime is 212311231101971. The next prime is 212311231102027. The reversal of 212311231101972 is 279101132113212.

212311231101972 is a `hidden beast` number, since 2 + 1 + 2 + 311 + 231 + 101 + 9 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212311231101971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265567054 + ... + 266365317.

It is an arithmetic number, because the mean of its divisors is an integer number (14909000522416).

Almost surely, 2^{212311231101972} is an apocalyptic number.

It is an amenable number.

212311231101972 is an abundant number, since it is smaller than the sum of its proper divisors (324412787705004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212311231101972 is a wasteful number, since it uses less digits than its factorization.

212311231101972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531943468 (or 531943463 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 212311231101972 in words is "two hundred twelve trillion, three hundred eleven billion, two hundred thirty-one million, one hundred one thousand, nine hundred seventy-two".