21222722361 has 8 divisors (see below), whose sum is σ = 29961490464. Its totient is φ = 13316217920.

The previous prime is 21222722359. The next prime is 21222722371. The reversal of 21222722361 is 16322722212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222722361 - 2¹ = 21222722359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222722371) 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, 208065855 + ... + 208065956.

It is an arithmetic number, because the mean of its divisors is an integer number (3745186308).

Almost surely, 2^21222722361 is an apocalyptic number.

It is an amenable number.

21222722361 is a deficient number, since it is larger than the sum of its proper divisors (8738768103).

21222722361 is a wasteful number, since it uses less digits than its factorization.

21222722361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416131831.

The product of its digits is 8064, while the sum is 30.

The spelling of 21222722361 in words is "twenty-one billion, two hundred twenty-two million, seven hundred twenty-two thousand, three hundred sixty-one".