22121342409 has 4 divisors (see below), whose sum is σ = 29495123216. Its totient is φ = 14747561604.

The previous prime is 22121342393. The next prime is 22121342443. The reversal of 22121342409 is 90424312122.

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 not a de Polignac number, because 22121342409 - 2⁴ = 22121342393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121346409) 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, 3686890399 + ... + 3686890404.

It is an arithmetic number, because the mean of its divisors is an integer number (7373780804).

Almost surely, 2^22121342409 is an apocalyptic number.

It is an amenable number.

22121342409 is a deficient number, since it is larger than the sum of its proper divisors (7373780807).

22121342409 is an equidigital number, since it uses as much as digits as its factorization.

22121342409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373780806.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 22121342409 in words is "twenty-two billion, one hundred twenty-one million, three hundred forty-two thousand, four hundred nine".