31022103223021 has 4 divisors (see below), whose sum is σ = 31179575828412. Its totient is φ = 30864630617632.

The previous prime is 31022103223003. The next prime is 31022103223031. The reversal of 31022103223021 is 12032230122013.

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 30547397380900 + 474705842121 = 5526970^2 + 688989^2 .

It is a cyclic number.

It is not a de Polignac number, because 31022103223021 - 2¹⁹ = 31022102698733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31022103222983 and 31022103223001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022103223031) 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, 78736302400 + ... + 78736302793.

It is an arithmetic number, because the mean of its divisors is an integer number (7794893957103).

Almost surely, 2^{31022103223021} is an apocalyptic number.

It is an amenable number.

31022103223021 is a deficient number, since it is larger than the sum of its proper divisors (157472605391).

31022103223021 is a wasteful number, since it uses less digits than its factorization.

31022103223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157472605390.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31022103223021 its reverse (12032230122013), we get a palindrome (43054333345034).

The spelling of 31022103223021 in words is "thirty-one trillion, twenty-two billion, one hundred three million, two hundred twenty-three thousand, twenty-one".