22121222401 has 4 divisors (see below), whose sum is σ = 22146275632. Its totient is φ = 22096169172.

The previous prime is 22121222399. The next prime is 22121222441. The reversal of 22121222401 is 10422212122.

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 22121222401 - 2¹ = 22121222399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121222441) 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, 12525291 + ... + 12527056.

It is an arithmetic number, because the mean of its divisors is an integer number (5536568908).

Almost surely, 2^22121222401 is an apocalyptic number.

It is an amenable number.

22121222401 is a deficient number, since it is larger than the sum of its proper divisors (25053231).

22121222401 is an equidigital number, since it uses as much as digits as its factorization.

22121222401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053230.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22121222401 its reverse (10422212122), we get a palindrome (32543434523).

The spelling of 22121222401 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, four hundred one".