10031122021 has 4 divisors (see below), whose sum is σ = 10053463500. Its totient is φ = 10008780544.

The previous prime is 10031122007. The next prime is 10031122027. The reversal of 10031122021 is 12022113001.

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 7830480100 + 2200641921 = 88490^2 + 46911^2 .

It is a cyclic number.

It is not a de Polignac number, because 10031122021 - 2¹⁵ = 10031089253 is a prime.

It is a super-2 number, since 2×10031122021² (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 = 10031121992 and 10031122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031122027) 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, 11170066 + ... + 11170963.

It is an arithmetic number, because the mean of its divisors is an integer number (2513365875).

Almost surely, 2^10031122021 is an apocalyptic number.

It is an amenable number.

10031122021 is a deficient number, since it is larger than the sum of its proper divisors (22341479).

10031122021 is an equidigital number, since it uses as much as digits as its factorization.

10031122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22341478.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10031122021 its reverse (12022113001), we get a palindrome (22053235022).

The spelling of 10031122021 in words is "ten billion, thirty-one million, one hundred twenty-two thousand, twenty-one".