22125456121 has 4 divisors (see below), whose sum is σ = 22839180544. Its totient is φ = 21411731700.

The previous prime is 22125456107. The next prime is 22125456151. The reversal of 22125456121 is 12165452122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12165452122 = 2 ⋅6082726061.

It is a cyclic number.

It is not a de Polignac number, because 22125456121 - 2¹¹ = 22125454073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 713724391 = 22125456121 / (2 + 2 + 1 + 2 + 5 + 4 + 5 + 6 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22125456151) 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, 356862165 + ... + 356862226.

It is an arithmetic number, because the mean of its divisors is an integer number (5709795136).

Almost surely, 2^22125456121 is an apocalyptic number.

It is an amenable number.

22125456121 is a deficient number, since it is larger than the sum of its proper divisors (713724423).

22125456121 is an equidigital number, since it uses as much as digits as its factorization.

22125456121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713724422.

The product of its digits is 9600, while the sum is 31.

The spelling of 22125456121 in words is "twenty-two billion, one hundred twenty-five million, four hundred fifty-six thousand, one hundred twenty-one".