11212011993 has 32 divisors (see below), whose sum is σ = 18544132096. Its totient is φ = 5867443008.

The previous prime is 11212011971. The next prime is 11212012001. The reversal of 11212011993 is 39911021211.

It is not a de Polignac number, because 11212011993 - 2⁵ = 11212011961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212011993.

It is not an unprimeable number, because it can be changed into a prime (11212011953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127021 + ... + 196362.

It is an arithmetic number, because the mean of its divisors is an integer number (579504128).

Almost surely, 2^11212011993 is an apocalyptic number.

11212011993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11212011993 is a deficient number, since it is larger than the sum of its proper divisors (7332120103).

11212011993 is a wasteful number, since it uses less digits than its factorization.

11212011993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323533.

The product of its (nonzero) digits is 972, while the sum is 30.

The spelling of 11212011993 in words is "eleven billion, two hundred twelve million, eleven thousand, nine hundred ninety-three".