211211102221002 has 24 divisors (see below), whose sum is σ = 492825905182884. Its totient is φ = 64988031452544.

The previous prime is 211211102220983. The next prime is 211211102221003. The reversal of 211211102221002 is 200122201112112.

211211102221002 is a `hidden beast` number, since 211 + 21 + 110 + 222 + 100 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 194084491079241 + 17126611141761 = 13931421^2 + 4138431^2 .

It is a super-2 number, since 2×211211102221002² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211211102221003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451305773743 + ... + 451305774210.

Almost surely, 2^{211211102221002} is an apocalyptic number.

211211102221002 is an abundant number, since it is smaller than the sum of its proper divisors (281614802961882).

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

211211102221002 is a wasteful number, since it uses less digits than its factorization.

211211102221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902611547974 (or 902611547971 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211211102221002 its reverse (200122201112112), we get a palindrome (411333303333114).

The spelling of 211211102221002 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, two".