22121024343021 has 6 divisors (see below), whose sum is σ = 31952590717710. Its totient is φ = 14747349562008.

The previous prime is 22121024342981. The next prime is 22121024343023. The reversal of 22121024343021 is 12034342012122.

22121024343021 is a `hidden beast` number, since 2 + 212 + 10 + 2 + 4 + 3 + 430 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14878655285796 + 7242369057225 = 3857286^2 + 2691165^2 .

It is not a de Polignac number, because 22121024343021 - 2²⁶ = 22120957234157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121024343023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228945796826 + ... + 1228945796843.

It is an arithmetic number, because the mean of its divisors is an integer number (5325431786285).

Almost surely, 2^{22121024343021} is an apocalyptic number.

It is an amenable number.

22121024343021 is a deficient number, since it is larger than the sum of its proper divisors (9831566374689).

22121024343021 is a wasteful number, since it uses less digits than its factorization.

22121024343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457891593675 (or 2457891593672 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 22121024343021 its reverse (12034342012122), we get a palindrome (34155366355143).

The spelling of 22121024343021 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-four million, three hundred forty-three thousand, twenty-one".