120121210112221 has 32 divisors (see below), whose sum is σ = 133345706457600. Its totient is φ = 107627912325120.

The previous prime is 120121210112209. The next prime is 120121210112237. The reversal of 120121210112221 is 122211012121021.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121210112221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121210412221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244106136 + ... + 244597726.

It is an arithmetic number, because the mean of its divisors is an integer number (4167053326800).

Almost surely, 2^{120121210112221} is an apocalyptic number.

It is an amenable number.

120121210112221 is a deficient number, since it is larger than the sum of its proper divisors (13224496345379).

120121210112221 is a wasteful number, since it uses less digits than its factorization.

120121210112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494589.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 120121210112221 its reverse (122211012121021), we get a palindrome (242332222233242).

The spelling of 120121210112221 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-one".