212125211165 has 16 divisors (see below), whose sum is σ = 292376467200. Its totient is φ = 144726341760.

The previous prime is 212125211153. The next prime is 212125211189. The reversal of 212125211165 is 561112521212.

It is a de Polignac number, because none of the positive numbers 2^k-212125211165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15220976 + ... + 15234905.

It is an arithmetic number, because the mean of its divisors is an integer number (18273529200).

Almost surely, 2^212125211165 is an apocalyptic number.

It is an amenable number.

212125211165 is a deficient number, since it is larger than the sum of its proper divisors (80251256035).

212125211165 is a wasteful number, since it uses less digits than its factorization.

212125211165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30456092.

The product of its digits is 2400, while the sum is 29.

Adding to 212125211165 its reverse (561112521212), we get a palindrome (773237732377).

The spelling of 212125211165 in words is "two hundred twelve billion, one hundred twenty-five million, two hundred eleven thousand, one hundred sixty-five".