10113021221 has 4 divisors (see below), whose sum is σ = 10439247744. Its totient is φ = 9786794700.

The previous prime is 10113021209. The next prime is 10113021253. The reversal of 10113021221 is 12212031101.

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 not a de Polignac number, because 10113021221 - 2⁶ = 10113021157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10113021196 and 10113021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10113921221) 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, 163113215 + ... + 163113276.

It is an arithmetic number, because the mean of its divisors is an integer number (2609811936).

Almost surely, 2^10113021221 is an apocalyptic number.

It is an amenable number.

10113021221 is a deficient number, since it is larger than the sum of its proper divisors (326226523).

10113021221 is an equidigital number, since it uses as much as digits as its factorization.

10113021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326226522.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10113021221 its reverse (12212031101), we get a palindrome (22325052322).

The spelling of 10113021221 in words is "ten billion, one hundred thirteen million, twenty-one thousand, two hundred twenty-one".