221021211102 has 64 divisors (see below), whose sum is σ = 476566723584. Its totient is φ = 68155084800.

The previous prime is 221021211043. The next prime is 221021211107. The reversal of 221021211102 is 201112120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021211107) 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, 723102 + ... + 982302.

It is an arithmetic number, because the mean of its divisors is an integer number (7446355056).

Almost surely, 2^221021211102 is an apocalyptic number.

221021211102 is an abundant number, since it is smaller than the sum of its proper divisors (255545512482).

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

221021211102 is a wasteful number, since it uses less digits than its factorization.

221021211102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259433.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221021211102 its reverse (201112120122), we get a palindrome (422133331224).

The spelling of 221021211102 in words is "two hundred twenty-one billion, twenty-one million, two hundred eleven thousand, one hundred two".