212511666116 has 24 divisors (see below), whose sum is σ = 384766609920. Its totient is φ = 102593966400.

The previous prime is 212511666083. The next prime is 212511666121. The reversal of 212511666116 is 611666115212.

It is a super-2 number, since 2×212511666116² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212511666116.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897505 + ... + 2006376.

It is an arithmetic number, because the mean of its divisors is an integer number (16031942080).

Almost surely, 2^212511666116 is an apocalyptic number.

It is an amenable number.

212511666116 is a deficient number, since it is larger than the sum of its proper divisors (172254943804).

212511666116 is a wasteful number, since it uses less digits than its factorization.

212511666116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904355 (or 3904353 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The spelling of 212511666116 in words is "two hundred twelve billion, five hundred eleven million, six hundred sixty-six thousand, one hundred sixteen".