22121444391 has 8 divisors (see below), whose sum is σ = 29522298624. Its totient is φ = 14734109880.

The previous prime is 22121444381. The next prime is 22121444399. The reversal of 22121444391 is 19344412122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22121444391 - 2⁷ = 22121444263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121444399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3376111 + ... + 3382656.

It is an arithmetic number, because the mean of its divisors is an integer number (3690287328).

Almost surely, 2^22121444391 is an apocalyptic number.

22121444391 is a deficient number, since it is larger than the sum of its proper divisors (7400854233).

22121444391 is a wasteful number, since it uses less digits than its factorization.

22121444391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759861.

The product of its digits is 13824, while the sum is 33.

The spelling of 22121444391 in words is "twenty-two billion, one hundred twenty-one million, four hundred forty-four thousand, three hundred ninety-one".