210011021993 has 12 divisors (see below), whose sum is σ = 225915258240. Its totient is φ = 195155418432.

The previous prime is 210011021963. The next prime is 210011022017. The reversal of 210011021993 is 399120110012.

It is not a de Polignac number, because 210011021993 - 2⁶ = 210011021929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210011021903) 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, 4576421 + ... + 4622082.

It is an arithmetic number, because the mean of its divisors is an integer number (18826271520).

Almost surely, 2^210011021993 is an apocalyptic number.

It is an amenable number.

210011021993 is a deficient number, since it is larger than the sum of its proper divisors (15904236247).

210011021993 is an equidigital number, since it uses as much as digits as its factorization.

210011021993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9198616 (or 9198599 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 210011021993 in words is "two hundred ten billion, eleven million, twenty-one thousand, nine hundred ninety-three".