900011201021993 has 2 divisors, whose sum is σ = 900011201021994. Its totient is φ = 900011201021992.

The previous prime is 900011201021981. The next prime is 900011201022007. The reversal of 900011201021993 is 399120102110009.

900011201021993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784619090168809 + 115392110853184 = 28011053^2 + 10742072^2 .

It is a cyclic number.

It is not a de Polignac number, because 900011201021993 - 2³⁶ = 899942481545257 is a prime.

It is not a weakly prime, because it can be changed into another prime (900011201021923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450005600510996 + 450005600510997.

It is an arithmetic number, because the mean of its divisors is an integer number (450005600510997).

Almost surely, 2^{900011201021993} is an apocalyptic number.

It is an amenable number.

900011201021993 is a deficient number, since it is larger than the sum of its proper divisors (1).

900011201021993 is an equidigital number, since it uses as much as digits as its factorization.

900011201021993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 900011201021993 in words is "nine hundred trillion, eleven billion, two hundred one million, twenty-one thousand, nine hundred ninety-three".