1231012022231 has 4 divisors (see below), whose sum is σ = 1231179537000. Its totient is φ = 1230844507464.

The previous prime is 1231012022197. The next prime is 1231012022263. The reversal of 1231012022231 is 1322202101321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231012022231 is a prime.

It is a super-2 number, since 2×1231012022231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231012022291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83746361 + ... + 83761058.

It is an arithmetic number, because the mean of its divisors is an integer number (307794884250).

Almost surely, 2^{1231012022231} is an apocalyptic number.

1231012022231 is a deficient number, since it is larger than the sum of its proper divisors (167514769).

1231012022231 is an equidigital number, since it uses as much as digits as its factorization.

1231012022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167514768.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1231012022231 its reverse (1322202101321), we get a palindrome (2553214123552).

The spelling of 1231012022231 in words is "one trillion, two hundred thirty-one billion, twelve million, twenty-two thousand, two hundred thirty-one".