221220211102 has 32 divisors (see below), whose sum is σ = 376616484864. Its totient is φ = 96544677600.

The previous prime is 221220211063. The next prime is 221220211153. The reversal of 221220211102 is 201112022122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190433 + ... + 1363660.

It is an arithmetic number, because the mean of its divisors is an integer number (11769265152).

Almost surely, 2^221220211102 is an apocalyptic number.

221220211102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221220211102 is a deficient number, since it is larger than the sum of its proper divisors (155396273762).

221220211102 is a wasteful number, since it uses less digits than its factorization.

221220211102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554264.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221220211102 its reverse (201112022122), we get a palindrome (422332233224).

The spelling of 221220211102 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred two".