1231032113021 has 4 divisors (see below), whose sum is σ = 1231034348544. Its totient is φ = 1231029877500.

The previous prime is 1231032112963. The next prime is 1231032113023. The reversal of 1231032113021 is 1203112301321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231032113021 - 2²² = 1231027918717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231032112984 and 1231032113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231032113023) 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, 355646 + ... + 1608896.

It is an arithmetic number, because the mean of its divisors is an integer number (307758587136).

Almost surely, 2^{1231032113021} is an apocalyptic number.

It is an amenable number.

1231032113021 is a deficient number, since it is larger than the sum of its proper divisors (2235523).

1231032113021 is an equidigital number, since it uses as much as digits as its factorization.

1231032113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235522.

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

Adding to 1231032113021 its reverse (1203112301321), we get a palindrome (2434144414342).

The spelling of 1231032113021 in words is "one trillion, two hundred thirty-one billion, thirty-two million, one hundred thirteen thousand, twenty-one".