121121002002120 has 32 divisors (see below), whose sum is σ = 363363006006720. Its totient is φ = 32298933867200.

The previous prime is 121121002002109. The next prime is 121121002002127. The reversal of 121121002002120 is 21200200121121.

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 121121002002120.

It is not an unprimeable number, because it can be changed into a prime (121121002002127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504670841556 + ... + 504670841795.

It is an arithmetic number, because the mean of its divisors is an integer number (11355093937710).

Almost surely, 2^{121121002002120} is an apocalyptic number.

121121002002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121002002120 is an abundant number, since it is smaller than the sum of its proper divisors (242242004004600).

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

121121002002120 is a wasteful number, since it uses less digits than its factorization.

121121002002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009341683365 (or 1009341683361 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121121002002120 its reverse (21200200121121), we get a palindrome (142321202123241).

The spelling of 121121002002120 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two million, two thousand, one hundred twenty".