121200200120 has 32 divisors (see below), whose sum is σ = 277322497200. Its totient is φ = 47658382848.

The previous prime is 121200200117. The next prime is 121200200123. The reversal of 121200200120 is 21002002121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121200200117) and next prime (121200200123).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200200123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25675649 + ... + 25680368.

Almost surely, 2^121200200120 is an apocalyptic number.

121200200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200200120 is an abundant number, since it is smaller than the sum of its proper divisors (156122297080).

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

121200200120 is a wasteful number, since it uses less digits than its factorization.

121200200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51356087 (or 51356083 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200200120 its reverse (21002002121), we get a palindrome (142202202241).

The spelling of 121200200120 in words is "one hundred twenty-one billion, two hundred million, two hundred thousand, one hundred twenty".