1212002120 has 32 divisors (see below), whose sum is σ = 3116577600. Its totient is φ = 415543488.

The previous prime is 1212002117. The next prime is 1212002149. The reversal of 1212002120 is 212002121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164010 + ... + 2164569.

It is an arithmetic number, because the mean of its divisors is an integer number (97393050).

Almost surely, 2^1212002120 is an apocalyptic number.

1212002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212002120 is an abundant number, since it is smaller than the sum of its proper divisors (1904575480).

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

1212002120 is a wasteful number, since it uses less digits than its factorization.

1212002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328597 (or 4328593 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212002120 is about 34813.8208187496. The cubic root of 1212002120 is about 1066.1896439079.

Adding to 1212002120 its reverse (212002121), we get a palindrome (1424004241).

Subtracting from 1212002120 its reverse (212002121), we obtain a palindrome (999999999).

The spelling of 1212002120 in words is "one billion, two hundred twelve million, two thousand, one hundred twenty".