213112011987 has 32 divisors (see below), whose sum is σ = 361326643200. Its totient is φ = 121608843264.

The previous prime is 213112011971. The next prime is 213112011989. The reversal of 213112011987 is 789110211312.

It is not a de Polignac number, because 213112011987 - 2⁴ = 213112011971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213112011989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648238 + ... + 920019.

It is an arithmetic number, because the mean of its divisors is an integer number (11291457600).

Almost surely, 2^213112011987 is an apocalyptic number.

213112011987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

213112011987 is a deficient number, since it is larger than the sum of its proper divisors (148214631213).

213112011987 is a wasteful number, since it uses less digits than its factorization.

213112011987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568992 (or 1568986 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

The spelling of 213112011987 in words is "two hundred thirteen billion, one hundred twelve million, eleven thousand, nine hundred eighty-seven".