212111019980 has 96 divisors (see below), whose sum is σ = 473418086400. Its totient is φ = 79662705408.

The previous prime is 212111019917. The next prime is 212111020013. The reversal of 212111019980 is 89910111212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212111019980.

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, 6269951 + ... + 6303689.

It is an arithmetic number, because the mean of its divisors is an integer number (4931438400).

Almost surely, 2^212111019980 is an apocalyptic number.

212111019980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212111019980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236709043200).

212111019980 is an abundant number, since it is smaller than the sum of its proper divisors (261307066420).

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

212111019980 is a wasteful number, since it uses less digits than its factorization.

212111019980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34023 (or 34021 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 212111019980 in words is "two hundred twelve billion, one hundred eleven million, nineteen thousand, nine hundred eighty".