1231433130021 has 32 divisors (see below), whose sum is σ = 1677817910400. Its totient is φ = 803154113280.

The previous prime is 1231433130013. The next prime is 1231433130029. The reversal of 1231433130021 is 1200313341321.

It is an interprime number because it is at equal distance from previous prime (1231433130013) and next prime (1231433130029).

It is not a de Polignac number, because 1231433130021 - 2³ = 1231433130013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231433129973 and 1231433130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231433130029) 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, 42688815 + ... + 42717651.

It is an arithmetic number, because the mean of its divisors is an integer number (52431809700).

Almost surely, 2^{1231433130021} is an apocalyptic number.

It is an amenable number.

1231433130021 is a deficient number, since it is larger than the sum of its proper divisors (446384780379).

1231433130021 is a wasteful number, since it uses less digits than its factorization.

1231433130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30149.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1231433130021 its reverse (1200313341321), we get a palindrome (2431746471342).

The spelling of 1231433130021 in words is "one trillion, two hundred thirty-one billion, four hundred thirty-three million, one hundred thirty thousand, twenty-one".