211221001982 has 8 divisors (see below), whose sum is σ = 316915755552. Its totient is φ = 105582416800.

The previous prime is 211221001969. The next prime is 211221001993. The reversal of 211221001982 is 289100122112.

211221001982 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211221001982² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14032694 + ... + 14047737.

It is an arithmetic number, because the mean of its divisors is an integer number (39614469444).

Almost surely, 2^211221001982 is an apocalyptic number.

211221001982 is a deficient number, since it is larger than the sum of its proper divisors (105694753570).

211221001982 is a wasteful number, since it uses less digits than its factorization.

211221001982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28084194.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 211221001982 in words is "two hundred eleven billion, two hundred twenty-one million, one thousand, nine hundred eighty-two".