121212222202 has 16 divisors (see below), whose sum is σ = 183168297000. Its totient is φ = 60156233728.

The previous prime is 121212222199. The next prime is 121212222211. The reversal of 121212222202 is 202222212121.

It can be written as a sum of positive squares in 4 ways, for example, as 91390731481 + 29821490721 = 302309^2 + 172689^2 .

It is a super-2 number, since 2×121212222202² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121212222202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2648538 + ... + 2693914.

Almost surely, 2^121212222202 is an apocalyptic number.

121212222202 is a deficient number, since it is larger than the sum of its proper divisors (61956074798).

121212222202 is a wasteful number, since it uses less digits than its factorization.

121212222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55265.

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

Adding to 121212222202 its reverse (202222212121), we get a palindrome (323434434323).

The spelling of 121212222202 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred two".