21031113022 has 8 divisors (see below), whose sum is σ = 31549726296. Its totient is φ = 10514537592.

The previous prime is 21031113007. The next prime is 21031113023. The reversal of 21031113022 is 22031113012.

21031113022 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21031112987 and 21031113005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031113023) 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, 483393 + ... + 525100.

It is an arithmetic number, because the mean of its divisors is an integer number (3943715787).

Almost surely, 2^21031113022 is an apocalyptic number.

21031113022 is a deficient number, since it is larger than the sum of its proper divisors (10518613274).

21031113022 is a wasteful number, since it uses less digits than its factorization.

21031113022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018922.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21031113022 its reverse (22031113012), we get a palindrome (43062226034).

The spelling of 21031113022 in words is "twenty-one billion, thirty-one million, one hundred thirteen thousand, twenty-two".