31222034021 has 8 divisors (see below), whose sum is σ = 31458433944. Its totient is φ = 30986403840.

The previous prime is 31222033979. The next prime is 31222034047. The reversal of 31222034021 is 12043022213.

It can be written as a sum of positive squares in 4 ways, for example, as 1046522500 + 30175511521 = 32350^2 + 173711^2 .

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 31222034021 - 2¹⁰ = 31222032997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31222033984 and 31222034002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31222034621) 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, 110876 + ... + 273381.

It is an arithmetic number, because the mean of its divisors is an integer number (3932304243).

Almost surely, 2^31222034021 is an apocalyptic number.

It is an amenable number.

31222034021 is a deficient number, since it is larger than the sum of its proper divisors (236399923).

31222034021 is a wasteful number, since it uses less digits than its factorization.

31222034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384871.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31222034021 its reverse (12043022213), we get a palindrome (43265056234).

The spelling of 31222034021 in words is "thirty-one billion, two hundred twenty-two million, thirty-four thousand, twenty-one".