31300131021 has 16 divisors (see below), whose sum is σ = 41807103936. Its totient is φ = 20829989376.

The previous prime is 31300131017. The next prime is 31300131047. The reversal of 31300131021 is 12013100313.

It is not a de Polignac number, because 31300131021 - 2² = 31300131017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300130021) 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, 6071581 + ... + 6076733.

It is an arithmetic number, because the mean of its divisors is an integer number (2612943996).

Almost surely, 2^31300131021 is an apocalyptic number.

It is an amenable number.

31300131021 is a deficient number, since it is larger than the sum of its proper divisors (10506972915).

31300131021 is a wasteful number, since it uses less digits than its factorization.

31300131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8332.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31300131021 its reverse (12013100313), we get a palindrome (43313231334).

The spelling of 31300131021 in words is "thirty-one billion, three hundred million, one hundred thirty-one thousand, twenty-one".