31012021022 has 4 divisors (see below), whose sum is σ = 46518031536. Its totient is φ = 15506010510.

The previous prime is 31012021021. The next prime is 31012021031. The reversal of 31012021022 is 22012021013.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 31012020988 and 31012021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012021021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7753005254 + ... + 7753005257.

It is an arithmetic number, because the mean of its divisors is an integer number (11629507884).

Almost surely, 2^31012021022 is an apocalyptic number.

31012021022 is a deficient number, since it is larger than the sum of its proper divisors (15506010514).

31012021022 is a wasteful number, since it uses less digits than its factorization.

31012021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15506010513.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31012021022 its reverse (22012021013), we get a palindrome (53024042035).

Subtracting from 31012021022 its reverse (22012021013), we obtain a palindrome (9000000009).

The spelling of 31012021022 in words is "thirty-one billion, twelve million, twenty-one thousand, twenty-two".