19922312221 has 12 divisors (see below), whose sum is σ = 22991640672. Its totient is φ = 16910415576.

The previous prime is 19922312203. The next prime is 19922312233. The reversal of 19922312221 is 12221322991.

It is not a de Polignac number, because 19922312221 - 2¹¹ = 19922310173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19922312281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59871 + ... + 208396.

It is an arithmetic number, because the mean of its divisors is an integer number (1915970056).

Almost surely, 2^19922312221 is an apocalyptic number.

It is an amenable number.

19922312221 is a deficient number, since it is larger than the sum of its proper divisors (3069328451).

19922312221 is an equidigital number, since it uses as much as digits as its factorization.

19922312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268480 (or 268377 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The spelling of 19922312221 in words is "nineteen billion, nine hundred twenty-two million, three hundred twelve thousand, two hundred twenty-one".