211021211980 has 12 divisors (see below), whose sum is σ = 443144545200. Its totient is φ = 84408484784.

The previous prime is 211021211977. The next prime is 211021211981. The reversal of 211021211980 is 89112120112.

It is not an unprimeable number, because it can be changed into a prime (211021211981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275530280 + ... + 5275530319.

It is an arithmetic number, because the mean of its divisors is an integer number (36928712100).

Almost surely, 2^211021211980 is an apocalyptic number.

211021211980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021211980 is an abundant number, since it is smaller than the sum of its proper divisors (232123333220).

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

211021211980 is a wasteful number, since it uses less digits than its factorization.

211021211980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551060608 (or 10551060606 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 211021211980 in words is "two hundred eleven billion, twenty-one million, two hundred eleven thousand, nine hundred eighty".