121220221004 has 12 divisors (see below), whose sum is σ = 212185792728. Its totient is φ = 60595708800.

The previous prime is 121220220991. The next prime is 121220221021. The reversal of 121220221004 is 400122022121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3581477 + ... + 3615164.

It is an arithmetic number, because the mean of its divisors is an integer number (17682149394).

Almost surely, 2^121220221004 is an apocalyptic number.

It is an amenable number.

121220221004 is a deficient number, since it is larger than the sum of its proper divisors (90965571724).

121220221004 is a wasteful number, since it uses less digits than its factorization.

121220221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7200856 (or 7200854 counting only the distinct ones).

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

Adding to 121220221004 its reverse (400122022121), we get a palindrome (521342243125).

The spelling of 121220221004 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, four".