221202112212122 has 32 divisors (see below), whose sum is σ = 339444956769600. Its totient is φ = 108081753591168.

The previous prime is 221202112212119. The next prime is 221202112212127. The reversal of 221202112212122 is 221212211202122.

It is not an unprimeable number, because it can be changed into a prime (221202112212127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543211829 + ... + 543618887.

It is an arithmetic number, because the mean of its divisors is an integer number (10607654899050).

Almost surely, 2^{221202112212122} is an apocalyptic number.

221202112212122 is a deficient number, since it is larger than the sum of its proper divisors (118242844557478).

221202112212122 is a wasteful number, since it uses less digits than its factorization.

221202112212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441390.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221202112212122 its reverse (221212211202122), we get a palindrome (442414323414244).

The spelling of 221202112212122 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred twelve thousand, one hundred twenty-two".