21000022202993 has 2 divisors, whose sum is σ = 21000022202994. Its totient is φ = 21000022202992.

The previous prime is 21000022202989. The next prime is 21000022203001. The reversal of 21000022202993 is 39920222000012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19142970071824 + 1857052131169 = 4375268^2 + 1362737^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000022202993 - 2² = 21000022202989 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000022202933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011101496 + 10500011101497.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011101497).

Almost surely, 2^{21000022202993} is an apocalyptic number.

It is an amenable number.

21000022202993 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000022202993 is an equidigital number, since it uses as much as digits as its factorization.

21000022202993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 21000022202993 in words is "twenty-one trillion, twenty-two million, two hundred two thousand, nine hundred ninety-three".