31234402302221 has 4 divisors (see below), whose sum is σ = 32311450657500. Its totient is φ = 30157353946944.

The previous prime is 31234402302139. The next prime is 31234402302247. The reversal of 31234402302221 is 12220320443213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6288233293225 + 24946169008996 = 2507635^2 + 4994614^2 .

It is a cyclic number.

It is not a de Polignac number, because 31234402302221 - 2³⁴ = 31217222433037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1077048355249 = 31234402302221 / (3 + 1 + 2 + 3 + 4 + 4 + 0 + 2 + 3 + 0 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234402305221) 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, 538524177596 + ... + 538524177653.

It is an arithmetic number, because the mean of its divisors is an integer number (8077862664375).

Almost surely, 2^{31234402302221} is an apocalyptic number.

It is an amenable number.

31234402302221 is a deficient number, since it is larger than the sum of its proper divisors (1077048355279).

31234402302221 is a wasteful number, since it uses less digits than its factorization.

31234402302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077048355278.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 31234402302221 its reverse (12220320443213), we get a palindrome (43454722745434).

The spelling of 31234402302221 in words is "thirty-one trillion, two hundred thirty-four billion, four hundred two million, three hundred two thousand, two hundred twenty-one".