121201012100120 has 64 divisors (see below), whose sum is σ = 274093253723520. Its totient is φ = 48233132168704.

The previous prime is 121201012100117. The next prime is 121201012100171. The reversal of 121201012100120 is 21001210102121.

It is a junction number, because it is equal to n+sod(n) for n = 121201012100095 and 121201012100104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367854974 + ... + 368184306.

It is an arithmetic number, because the mean of its divisors is an integer number (4282707089430).

Almost surely, 2^{121201012100120} is an apocalyptic number.

121201012100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201012100120 is an abundant number, since it is smaller than the sum of its proper divisors (152892241623400).

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

121201012100120 is a wasteful number, since it uses less digits than its factorization.

121201012100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376244 (or 376240 counting only the distinct ones).

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

Adding to 121201012100120 its reverse (21001210102121), we get a palindrome (142202222202241).

The spelling of 121201012100120 in words is "one hundred twenty-one trillion, two hundred one billion, twelve million, one hundred thousand, one hundred twenty".