121002222222 has 32 divisors (see below), whose sum is σ = 307307232000. Its totient is φ = 34572063384.

The previous prime is 121002222203. The next prime is 121002222293. The reversal of 121002222222 is 222222200121.

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

121002222222 is a modest number, since divided by 222222 gives 121002 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 121002222195 and 121002222204.

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 15 ways as a sum of consecutive naturals, for example, 160055472 + ... + 160056227.

It is an arithmetic number, because the mean of its divisors is an integer number (9603351000).

Almost surely, 2^121002222222 is an apocalyptic number.

121002222222 is an abundant number, since it is smaller than the sum of its proper divisors (186305009778).

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

121002222222 is a wasteful number, since it uses less digits than its factorization.

121002222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320111717 (or 320111711 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 121002222222 its reverse (222222200121), we get a palindrome (343224422343).

It can be divided in two parts, 12100 and 2222222, that added together give a palindrome (2234322).

The spelling of 121002222222 in words is "one hundred twenty-one billion, two million, two hundred twenty-two thousand, two hundred twenty-two".