22120229991 has 4 divisors (see below), whose sum is σ = 29493639992. Its totient is φ = 14746819992.

The previous prime is 22120229987. The next prime is 22120229993. The reversal of 22120229991 is 19992202122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22120229991 - 2² = 22120229987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120229993) 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, 3686704996 + ... + 3686705001.

It is an arithmetic number, because the mean of its divisors is an integer number (7373409998).

Almost surely, 2^22120229991 is an apocalyptic number.

22120229991 is a deficient number, since it is larger than the sum of its proper divisors (7373410001).

22120229991 is an equidigital number, since it uses as much as digits as its factorization.

22120229991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373410000.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 22120229991 in words is "twenty-two billion, one hundred twenty million, two hundred twenty-nine thousand, nine hundred ninety-one".