121000000002120 has 192 divisors, whose sum is σ = 420970132477440. Its totient is φ = 31225806374400.

The previous prime is 121000000002073. The next prime is 121000000002131. The reversal of 121000000002120 is 21200000000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200481901 + ... + 201084540.

It is an arithmetic number, because the mean of its divisors is an integer number (2192552773320).

Almost surely, 2^{121000000002120} is an apocalyptic number.

121000000002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000000002120 is an abundant number, since it is smaller than the sum of its proper divisors (299970132475320).

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

121000000002120 is a wasteful number, since it uses less digits than its factorization.

121000000002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401566498 (or 401566482 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000000002120 its reverse (21200000000121), we get a palindrome (142200000002241).

The spelling of 121000000002120 in words is "one hundred twenty-one trillion, two thousand, one hundred twenty".