31314033401221 has 4 divisors (see below), whose sum is σ = 31330083650944. Its totient is φ = 31297983151500.

The previous prime is 31314033401197. The next prime is 31314033401239. The reversal of 31314033401221 is 12210433041313.

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 31314033401221 - 2³¹ = 31311885917573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31314033401221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31314033401291) 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, 8025121935 + ... + 8025125836.

It is an arithmetic number, because the mean of its divisors is an integer number (7832520912736).

Almost surely, 2^{31314033401221} is an apocalyptic number.

It is an amenable number.

31314033401221 is a deficient number, since it is larger than the sum of its proper divisors (16050249723).

31314033401221 is a wasteful number, since it uses less digits than its factorization.

31314033401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050249722.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 31314033401221 its reverse (12210433041313), we get a palindrome (43524466442534).

The spelling of 31314033401221 in words is "thirty-one trillion, three hundred fourteen billion, thirty-three million, four hundred one thousand, two hundred twenty-one".