1212002002120 has 96 divisors (see below), whose sum is σ = 3374754649920. Its totient is φ = 383578640640.

The previous prime is 1212002002109. The next prime is 1212002002147. The reversal of 1212002002120 is 212002002121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1212002002120.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12759126 + ... + 12853765.

It is an arithmetic number, because the mean of its divisors is an integer number (35153694270).

Almost surely, 2^{1212002002120} is an apocalyptic number.

1212002002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212002002120 is an abundant number, since it is smaller than the sum of its proper divisors (2162752647800).

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

1212002002120 is a wasteful number, since it uses less digits than its factorization.

1212002002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25612935 (or 25612918 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212002002120 its reverse (212002002121), we get a palindrome (1424004004241).

Subtracting from 1212002002120 its reverse (212002002121), we obtain a palindrome (999999999999).

The spelling of 1212002002120 in words is "one trillion, two hundred twelve billion, two million, two thousand, one hundred twenty".