121100000120 has 128 divisors (see below), whose sum is σ = 299256249600. Its totient is φ = 43739520000.

The previous prime is 121100000113. The next prime is 121100000141. The reversal of 121100000120 is 21000001121.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 121100000098 and 121100000107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46273052 + ... + 46275668.

It is an arithmetic number, because the mean of its divisors is an integer number (2337939450).

Almost surely, 2^121100000120 is an apocalyptic number.

121100000120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121100000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149628124800).

121100000120 is an abundant number, since it is smaller than the sum of its proper divisors (178156249480).

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

121100000120 is a wasteful number, since it uses less digits than its factorization.

121100000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3305 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 121100000120 its reverse (21000001121), we get a palindrome (142100001241).

The spelling of 121100000120 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty", and thus it is an aban number.