121221002222 has 16 divisors (see below), whose sum is σ = 186324969600. Its totient is φ = 59128363320.

The previous prime is 121221002197. The next prime is 121221002261. The reversal of 121221002222 is 222200122121.

It is a happy number.

It is a super-2 number, since 2×121221002222² (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 121221002222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3905522 + ... + 3936437.

It is an arithmetic number, because the mean of its divisors is an integer number (11645310600).

Almost surely, 2^121221002222 is an apocalyptic number.

121221002222 is a deficient number, since it is larger than the sum of its proper divisors (65103967378).

121221002222 is a wasteful number, since it uses less digits than its factorization.

121221002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842151.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121221002222 its reverse (222200122121), we get a palindrome (343421124343).

The spelling of 121221002222 in words is "one hundred twenty-one billion, two hundred twenty-one million, two thousand, two hundred twenty-two".