22012021021993 has 2 divisors, whose sum is σ = 22012021021994. Its totient is φ = 22012021021992.

The previous prime is 22012021021987. The next prime is 22012021022041. The reversal of 22012021021993 is 39912012021022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13054289277184 + 8957731744809 = 3613072^2 + 2992947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22012021021993 is a prime.

It is not a weakly prime, because it can be changed into another prime (22012021021943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006010510996 + 11006010510997.

It is an arithmetic number, because the mean of its divisors is an integer number (11006010510997).

Almost surely, 2^{22012021021993} is an apocalyptic number.

It is an amenable number.

22012021021993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012021021993 is an equidigital number, since it uses as much as digits as its factorization.

22012021021993 is an evil number, because the sum of its binary digits is even.

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

The spelling of 22012021021993 in words is "twenty-two trillion, twelve billion, twenty-one million, twenty-one thousand, nine hundred ninety-three".