212113101578 has 32 divisors (see below), whose sum is σ = 376217222400. Its totient is φ = 87757858944.

The previous prime is 212113101533. The next prime is 212113101601. The reversal of 212113101578 is 875101311212.

It is a super-2 number, since 2×212113101578² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976083 + ... + 3046521.

It is an arithmetic number, because the mean of its divisors is an integer number (11756788200).

Almost surely, 2^212113101578 is an apocalyptic number.

212113101578 is a deficient number, since it is larger than the sum of its proper divisors (164104120822).

212113101578 is a wasteful number, since it uses less digits than its factorization.

212113101578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77894.

The product of its (nonzero) digits is 3360, while the sum is 32.

The spelling of 212113101578 in words is "two hundred twelve billion, one hundred thirteen million, one hundred one thousand, five hundred seventy-eight".