10221022121 has 4 divisors (see below), whose sum is σ = 10550732544. Its totient is φ = 9891311700.

The previous prime is 10221022067. The next prime is 10221022157. The reversal of 10221022121 is 12122012201.

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-10221022121 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 = 10221022096 and 10221022105.

It is not an unprimeable number, because it can be changed into a prime (10221022171) 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, 164855165 + ... + 164855226.

It is an arithmetic number, because the mean of its divisors is an integer number (2637683136).

Almost surely, 2^10221022121 is an apocalyptic number.

It is an amenable number.

10221022121 is a deficient number, since it is larger than the sum of its proper divisors (329710423).

10221022121 is an equidigital number, since it uses as much as digits as its factorization.

10221022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329710422.

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

Adding to 10221022121 its reverse (12122012201), we get a palindrome (22343034322).

The spelling of 10221022121 in words is "ten billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".