10021220031 has 4 divisors (see below), whose sum is σ = 13361626712. Its totient is φ = 6680813352.

The previous prime is 10021220003. The next prime is 10021220057. The reversal of 10021220031 is 13002212001.

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

It is not a de Polignac number, because 10021220031 - 2⁹ = 10021219519 is a prime.

It is a super-2 number, since 2×10021220031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021219989 and 10021220016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021220071) 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, 1670203336 + ... + 1670203341.

It is an arithmetic number, because the mean of its divisors is an integer number (3340406678).

Almost surely, 2^10021220031 is an apocalyptic number.

10021220031 is a deficient number, since it is larger than the sum of its proper divisors (3340406681).

10021220031 is an equidigital number, since it uses as much as digits as its factorization.

10021220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340406680.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10021220031 its reverse (13002212001), we get a palindrome (23023432032).

The spelling of 10021220031 in words is "ten billion, twenty-one million, two hundred twenty thousand, thirty-one".