221212200102 has 16 divisors (see below), whose sum is σ = 442480689840. Its totient is φ = 73728018432.

The previous prime is 221212200037. The next prime is 221212200109. The reversal of 221212200102 is 201002212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212200109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2294227 + ... + 2388702.

It is an arithmetic number, because the mean of its divisors is an integer number (27655043115).

Almost surely, 2^221212200102 is an apocalyptic number.

221212200102 is an abundant number, since it is smaller than the sum of its proper divisors (221268489738).

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

221212200102 is a wasteful number, since it uses less digits than its factorization.

221212200102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690807.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221212200102 its reverse (201002212122), we get a palindrome (422214412224).

The spelling of 221212200102 in words is "two hundred twenty-one billion, two hundred twelve million, two hundred thousand, one hundred two".