121201212210120 has 256 divisors, whose sum is σ = 471542711500800. Its totient is φ = 27113705752320.

The previous prime is 121201212210103. The next prime is 121201212210173. The reversal of 121201212210120 is 21012212102121.

121201212210120 is a `hidden beast` number, since 1 + 2 + 120 + 1 + 212 + 210 + 120 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 121201212210093 and 121201212210102.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 170196876 + ... + 170907515.

It is an arithmetic number, because the mean of its divisors is an integer number (1841963716800).

Almost surely, 2^{121201212210120} is an apocalyptic number.

121201212210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201212210120 is an abundant number, since it is smaller than the sum of its proper divisors (350341499290680).

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

121201212210120 is a wasteful number, since it uses less digits than its factorization.

121201212210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341104465 (or 341104455 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121201212210120 its reverse (21012212102121), we get a palindrome (142213424312241).

The spelling of 121201212210120 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, two hundred ten thousand, one hundred twenty".