212011331231 has 32 divisors (see below), whose sum is σ = 251152957440. Its totient is φ = 175133599200.

The previous prime is 212011331197. The next prime is 212011331263. The reversal of 212011331231 is 132133110212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212011331231 is a prime.

It is a super-2 number, since 2×212011331231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011331281) 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, 60109190 + ... + 60112716.

It is an arithmetic number, because the mean of its divisors is an integer number (7848529920).

Almost surely, 2^212011331231 is an apocalyptic number.

212011331231 is a deficient number, since it is larger than the sum of its proper divisors (39141626209).

212011331231 is a wasteful number, since it uses less digits than its factorization.

212011331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 212011331231 its reverse (132133110212), we get a palindrome (344144441443).

The spelling of 212011331231 in words is "two hundred twelve billion, eleven million, three hundred thirty-one thousand, two hundred thirty-one".