221426675232121 has 4 divisors (see below), whose sum is σ = 221426746592512. Its totient is φ = 221426603871732.

The previous prime is 221426675232107. The next prime is 221426675232181. The reversal of 221426675232121 is 121232576624122.

221426675232121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-221426675232121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221426675232181) 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, 30803625 + ... + 37305718.

It is an arithmetic number, because the mean of its divisors is an integer number (55356686648128).

Almost surely, 2^{221426675232121} is an apocalyptic number.

It is an amenable number.

221426675232121 is a deficient number, since it is larger than the sum of its proper divisors (71360391).

221426675232121 is an equidigital number, since it uses as much as digits as its factorization.

221426675232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71360390.

The product of its digits is 967680, while the sum is 46.

The spelling of 221426675232121 in words is "two hundred twenty-one trillion, four hundred twenty-six billion, six hundred seventy-five million, two hundred thirty-two thousand, one hundred twenty-one".