211002011221220 has 96 divisors (see below), whose sum is σ = 450137511532800. Its totient is φ = 83071931351040.

The previous prime is 211002011221189. The next prime is 211002011221229. The reversal of 211002011221220 is 22122110200112.

It is not an unprimeable number, because it can be changed into a prime (211002011221229) 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, 433516556 + ... + 434003004.

It is an arithmetic number, because the mean of its divisors is an integer number (4688932411800).

Almost surely, 2^{211002011221220} is an apocalyptic number.

211002011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211002011221220 is an abundant number, since it is smaller than the sum of its proper divisors (239135500311580).

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

211002011221220 is a wasteful number, since it uses less digits than its factorization.

211002011221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487845 (or 487843 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211002011221220 its reverse (22122110200112), we get a palindrome (233124121421332).

The spelling of 211002011221220 in words is "two hundred eleven trillion, two billion, eleven million, two hundred twenty-one thousand, two hundred twenty".