212108717880 has 128 divisors (see below), whose sum is σ = 731409480000. Its totient is φ = 54611891712.

The previous prime is 212108717879. The next prime is 212108717921. The reversal of 212108717880 is 88717801212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3354835 + ... + 3417474.

Almost surely, 2^212108717880 is an apocalyptic number.

212108717880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212108717880 is an abundant number, since it is smaller than the sum of its proper divisors (519300762120).

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

212108717880 is a wasteful number, since it uses less digits than its factorization.

212108717880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772358 (or 6772348 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 45.

The spelling of 212108717880 in words is "two hundred twelve billion, one hundred eight million, seven hundred seventeen thousand, eight hundred eighty".