121010120 has 128 divisors (see below), whose sum is σ = 343699200. Its totient is φ = 37248000.

The previous prime is 121010117. The next prime is 121010137. The reversal of 121010120 is 21010121.

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 = 121010098 and 121010107.

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, 310886 + ... + 311274.

It is an arithmetic number, because the mean of its divisors is an integer number (2685150).

Almost surely, 2^121010120 is an apocalyptic number.

121010120 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 121010120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171849600).

121010120 is an abundant number, since it is smaller than the sum of its proper divisors (222689080).

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

121010120 is a wasteful number, since it uses less digits than its factorization.

121010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 515 counting only the distinct ones).

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

The square root of 121010120 is about 11000.4599903822. The cubic root of 121010120 is about 494.6225330327.

Adding to 121010120 its reverse (21010121), we get a palindrome (142020241).

Subtracting from 121010120 its reverse (21010121), we obtain a palindrome (99999999).

It can be divided in two parts, 1210101 and 20, that added together give a palindrome (1210121).

The spelling of 121010120 in words is "one hundred twenty-one million, ten thousand, one hundred twenty".