31322141021 has 4 divisors (see below), whose sum is σ = 31357694844. Its totient is φ = 31286587200.

The previous prime is 31322140999. The next prime is 31322141027. The reversal of 31322141021 is 12014122313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12014122313 = 19 ⋅632322227.

It can be written as a sum of positive squares in 2 ways, for example, as 20030740900 + 11291400121 = 141530^2 + 106261^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322141021 - 2¹⁴ = 31322124637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322140984 and 31322141002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322141027) 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, 17775590 + ... + 17777351.

It is an arithmetic number, because the mean of its divisors is an integer number (7839423711).

Almost surely, 2^31322141021 is an apocalyptic number.

It is an amenable number.

31322141021 is a deficient number, since it is larger than the sum of its proper divisors (35553823).

31322141021 is an equidigital number, since it uses as much as digits as its factorization.

31322141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35553822.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31322141021 its reverse (12014122313), we get a palindrome (43336263334).

The spelling of 31322141021 in words is "thirty-one billion, three hundred twenty-two million, one hundred forty-one thousand, twenty-one".