10122221021 has 4 divisors (see below), whose sum is σ = 11042422944. Its totient is φ = 9202019100.

The previous prime is 10122221009. The next prime is 10122221033. The reversal of 10122221021 is 12012222101.

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 an interprime number because it is at equal distance from previous prime (10122221009) and next prime (10122221033).

It is a cyclic number.

It is not a de Polignac number, because 10122221021 - 2¹⁰ = 10122219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122220987 and 10122221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122221051) 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, 460100945 + ... + 460100966.

It is an arithmetic number, because the mean of its divisors is an integer number (2760605736).

Almost surely, 2^10122221021 is an apocalyptic number.

10122221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10122221021 is a deficient number, since it is larger than the sum of its proper divisors (920201923).

10122221021 is an equidigital number, since it uses as much as digits as its factorization.

10122221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920201922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10122221021 its reverse (12012222101), we get a palindrome (22134443122).

The spelling of 10122221021 in words is "ten billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".