121221221202 has 96 divisors (see below), whose sum is σ = 270406656000. Its totient is φ = 39233465856.

The previous prime is 121221221183. The next prime is 121221221227. The reversal of 121221221202 is 202122122121.

It is a happy number.

121221221202 is a `hidden beast` number, since 1 + 21 + 221 + 221 + 202 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 39756174 + ... + 39759222.

It is an arithmetic number, because the mean of its divisors is an integer number (2816736000).

Almost surely, 2^121221221202 is an apocalyptic number.

121221221202 is an abundant number, since it is smaller than the sum of its proper divisors (149185434798).

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

121221221202 is a wasteful number, since it uses less digits than its factorization.

121221221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3589 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121221221202 its reverse (202122122121), we get a palindrome (323343343323).

The spelling of 121221221202 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred two".