211223312993 has 96 divisors (see below), whose sum is σ = 288742008960. Its totient is φ = 152470563840.

The previous prime is 211223312957. The next prime is 211223313071. The reversal of 211223312993 is 399213322112.

It is a happy number.

It is not a de Polignac number, because 211223312993 - 2²⁰ = 211222264417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211223312953) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42216830 + ... + 42221832.

It is an arithmetic number, because the mean of its divisors is an integer number (3007729260).

Almost surely, 2^211223312993 is an apocalyptic number.

It is an amenable number.

211223312993 is a deficient number, since it is larger than the sum of its proper divisors (77518695967).

211223312993 is a wasteful number, since it uses less digits than its factorization.

211223312993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167 (or 5160 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The spelling of 211223312993 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred twelve thousand, nine hundred ninety-three".