221212012202 has 16 divisors (see below), whose sum is σ = 366612236352. Its totient is φ = 99573693120.

The previous prime is 221212012199. The next prime is 221212012207. The reversal of 221212012202 is 202210212122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (221212012207) 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, 141439124 + ... + 141440687.

It is an arithmetic number, because the mean of its divisors is an integer number (22913264772).

Almost surely, 2^221212012202 is an apocalyptic number.

221212012202 is a deficient number, since it is larger than the sum of its proper divisors (145400224150).

221212012202 is a wasteful number, since it uses less digits than its factorization.

221212012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282879853.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221212012202 its reverse (202210212122), we get a palindrome (423422224324).

The spelling of 221212012202 in words is "two hundred twenty-one billion, two hundred twelve million, twelve thousand, two hundred two".