31300000010221 has 4 divisors (see below), whose sum is σ = 31430962353600. Its totient is φ = 31169037666844.

The previous prime is 31300000010207. The next prime is 31300000010231. The reversal of 31300000010221 is 12201000000313.

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 31300000010221 - 2⁹ = 31300000009709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300000010231) 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, 65481171331 + ... + 65481171808.

It is an arithmetic number, because the mean of its divisors is an integer number (7857740588400).

Almost surely, 2^{31300000010221} is an apocalyptic number.

It is an amenable number.

31300000010221 is a deficient number, since it is larger than the sum of its proper divisors (130962343379).

31300000010221 is a wasteful number, since it uses less digits than its factorization.

31300000010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130962343378.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31300000010221 its reverse (12201000000313), we get a palindrome (43501000010534).

The spelling of 31300000010221 in words is "thirty-one trillion, three hundred billion, ten thousand, two hundred twenty-one".