212021110680 has 128 divisors (see below), whose sum is σ = 702760665600. Its totient is φ = 50899515392.

The previous prime is 212021110621. The next prime is 212021110681. The reversal of 212021110680 is 86011120212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 212021110680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021110681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2212470 + ... + 2306309.

It is an arithmetic number, because the mean of its divisors is an integer number (5490317700).

Almost surely, 2^212021110680 is an apocalyptic number.

212021110680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021110680 is an abundant number, since it is smaller than the sum of its proper divisors (490739554920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021110680 is a wasteful number, since it uses less digits than its factorization.

212021110680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518833 (or 4518829 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 212021110680 its reverse (86011120212), we get a palindrome (298032230892).

The spelling of 212021110680 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, six hundred eighty".