121200121100120 has 32 divisors (see below), whose sum is σ = 277322310997200. Its totient is φ = 47658352702848.

The previous prime is 121200121100081. The next prime is 121200121100171. The reversal of 121200121100120 is 21001121002121.

It is a junction number, because it is equal to n+sod(n) for n = 121200121100095 and 121200121100104.

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, 25677989399 + ... + 25677994118.

Almost surely, 2^{121200121100120} is an apocalyptic number.

121200121100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200121100120 is an abundant number, since it is smaller than the sum of its proper divisors (156122189897080).

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

121200121100120 is a wasteful number, since it uses less digits than its factorization.

121200121100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51355983587 (or 51355983583 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121200121100120 its reverse (21001121002121), we get a palindrome (142201242102241).

The spelling of 121200121100120 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, one hundred thousand, one hundred twenty".