10312223021 has 4 divisors (see below), whose sum is σ = 10345813632. Its totient is φ = 10278632412.

The previous prime is 10312223003. The next prime is 10312223023. The reversal of 10312223021 is 12032221301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10312223021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312223023) 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, 16794845 + ... + 16795458.

It is an arithmetic number, because the mean of its divisors is an integer number (2586453408).

Almost surely, 2^10312223021 is an apocalyptic number.

It is an amenable number.

10312223021 is a deficient number, since it is larger than the sum of its proper divisors (33590611).

10312223021 is an equidigital number, since it uses as much as digits as its factorization.

10312223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33590610.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 10312223021 its reverse (12032221301), we get a palindrome (22344444322).

The spelling of 10312223021 in words is "ten billion, three hundred twelve million, two hundred twenty-three thousand, twenty-one".