31312033010221 has 8 divisors (see below), whose sum is σ = 31830426900864. Its totient is φ = 30793803051120.

The previous prime is 31312033010183. The next prime is 31312033010233. The reversal of 31312033010221 is 12201033021313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31312033010221 - 2¹⁵ = 31312032977453 is a prime.

It is a super-2 number, since 2×31312033010221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312033010192 and 31312033010201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312033010261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40597681 + ... + 41361766.

It is an arithmetic number, because the mean of its divisors is an integer number (3978803362608).

Almost surely, 2^{31312033010221} is an apocalyptic number.

It is an amenable number.

31312033010221 is a deficient number, since it is larger than the sum of its proper divisors (518393890643).

31312033010221 is an equidigital number, since it uses as much as digits as its factorization.

31312033010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81965771.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31312033010221 its reverse (12201033021313), we get a palindrome (43513066031534).

The spelling of 31312033010221 in words is "thirty-one trillion, three hundred twelve billion, thirty-three million, ten thousand, two hundred twenty-one".