1231132221023 has 16 divisors (see below), whose sum is σ = 1241709004800. Its totient is φ = 1220600240160.

The previous prime is 1231132220957. The next prime is 1231132221073. The reversal of 1231132221023 is 3201222311321.

It is a cyclic number.

It is not a de Polignac number, because 1231132221023 - 2³⁴ = 1213952351839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231132221023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231132221073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155461658 + ... + 155469576.

It is an arithmetic number, because the mean of its divisors is an integer number (77606812800).

Almost surely, 2^{1231132221023} is an apocalyptic number.

1231132221023 is a deficient number, since it is larger than the sum of its proper divisors (10576783777).

1231132221023 is a wasteful number, since it uses less digits than its factorization.

1231132221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1231132221023 its reverse (3201222311321), we get a palindrome (4432354532344).

The spelling of 1231132221023 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, twenty-three".