211021211982 has 64 divisors (see below), whose sum is σ = 514675422720. Its totient is φ = 56336062464.

The previous prime is 211021211981. The next prime is 211021212011. The reversal of 211021211982 is 289112120112.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1752963 + ... + 1869470.

It is an arithmetic number, because the mean of its divisors is an integer number (8041803480).

Almost surely, 2^211021211982 is an apocalyptic number.

211021211982 is an abundant number, since it is smaller than the sum of its proper divisors (303654210738).

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

211021211982 is a wasteful number, since it uses less digits than its factorization.

211021211982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622537.

The product of its (nonzero) digits is 1152, while the sum is 30.

The spelling of 211021211982 in words is "two hundred eleven billion, twenty-one million, two hundred eleven thousand, nine hundred eighty-two".