121101100102120 has 128 divisors (see below), whose sum is σ = 277540375622400. Its totient is φ = 47543040792576.

The previous prime is 121101100102117. The next prime is 121101100102153. The reversal of 121101100102120 is 21201001101121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121101100102120.

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, 8330535492 + ... + 8330550028.

It is an arithmetic number, because the mean of its divisors is an integer number (2168284184550).

Almost surely, 2^{121101100102120} is an apocalyptic number.

121101100102120 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 121101100102120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138770187811200).

121101100102120 is an abundant number, since it is smaller than the sum of its proper divisors (156439275520280).

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

121101100102120 is a wasteful number, since it uses less digits than its factorization.

121101100102120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20027 (or 20023 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121101100102120 its reverse (21201001101121), we get a palindrome (142302101203241).

Subtracting from 121101100102120 its reverse (21201001101121), we obtain a palindrome (99900099000999).

The spelling of 121101100102120 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred million, one hundred two thousand, one hundred twenty".