121221202222 has 16 divisors (see below), whose sum is σ = 190268548992. Its totient is φ = 57851919360.

The previous prime is 121221202169. The next prime is 121221202373. The reversal of 121221202222 is 222202122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221202222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13387123 + ... + 13396174.

It is an arithmetic number, because the mean of its divisors is an integer number (11891784312).

Almost surely, 2^121221202222 is an apocalyptic number.

121221202222 is a deficient number, since it is larger than the sum of its proper divisors (69047346770).

121221202222 is a wasteful number, since it uses less digits than its factorization.

121221202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26783403.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121221202222 its reverse (222202122121), we get a palindrome (343423324343).

The spelling of 121221202222 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-two".