221001221211102 has 16 divisors (see below), whose sum is σ = 491113824913680. Its totient is φ = 73667073737016.

The previous prime is 221001221211077. The next prime is 221001221211137. The reversal of 221001221211102 is 201112122100122.

221001221211102 is a `hidden beast` number, since 221 + 0 + 0 + 1 + 221 + 211 + 10 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2046307603753 + ... + 2046307603860.

It is an arithmetic number, because the mean of its divisors is an integer number (30694614057105).

Almost surely, 2^{221001221211102} is an apocalyptic number.

221001221211102 is an abundant number, since it is smaller than the sum of its proper divisors (270112603702578).

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

221001221211102 is a wasteful number, since it uses less digits than its factorization.

221001221211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092615207624 (or 4092615207618 counting only the distinct ones).

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

Adding to 221001221211102 its reverse (201112122100122), we get a palindrome (422113343311224).

The spelling of 221001221211102 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred two".