212510868691 has 24 divisors (see below), whose sum is σ = 234700846704. Its totient is φ = 192404520000.

The previous prime is 212510868677. The next prime is 212510868719. The reversal of 212510868691 is 196868015212.

It is not a de Polignac number, because 212510868691 - 2¹⁵ = 212510835923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212510868671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336783946 + ... + 336784576.

It is an arithmetic number, because the mean of its divisors is an integer number (9779201946).

Almost surely, 2^212510868691 is an apocalyptic number.

212510868691 is a deficient number, since it is larger than the sum of its proper divisors (22189978013).

212510868691 is an frugal number, since it uses more digits than its factorization.

212510868691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 212510868691 in words is "two hundred twelve billion, five hundred ten million, eight hundred sixty-eight thousand, six hundred ninety-one".