22215512021 has 8 divisors (see below), whose sum is σ = 23212621440. Its totient is φ = 21221004112.

The previous prime is 22215511979. The next prime is 22215512023. The reversal of 22215512021 is 12021551222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22215512021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215512023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632906 + ... + 667083.

It is an arithmetic number, because the mean of its divisors is an integer number (2901577680).

Almost surely, 2^22215512021 is an apocalyptic number.

It is an amenable number.

22215512021 is a deficient number, since it is larger than the sum of its proper divisors (997109419).

22215512021 is a wasteful number, since it uses less digits than its factorization.

22215512021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300755.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 22215512021 in words is "twenty-two billion, two hundred fifteen million, five hundred twelve thousand, twenty-one".