121000000000920 has 128 divisors (see below), whose sum is σ = 383773846752000. Its totient is φ = 30434934366720.

The previous prime is 121000000000907. The next prime is 121000000000921. The reversal of 121000000000920 is 29000000000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121000000000920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000000000921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115351626 + ... + 116395865.

It is an arithmetic number, because the mean of its divisors is an integer number (2998233177750).

Almost surely, 2^{121000000000920} is an apocalyptic number.

121000000000920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000000000920 is an abundant number, since it is smaller than the sum of its proper divisors (262773846751080).

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

121000000000920 is a wasteful number, since it uses less digits than its factorization.

121000000000920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231747753 (or 231747749 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The spelling of 121000000000920 in words is "one hundred twenty-one trillion, nine hundred twenty", and thus it is an aban number.