1212011202120 has 64 divisors (see below), whose sum is σ = 3653266069440. Its totient is φ = 321671212800.

The previous prime is 1212011202107. The next prime is 1212011202133. The reversal of 1212011202120 is 212021102121.

It is an interprime number because it is at equal distance from previous prime (1212011202107) and next prime (1212011202133).

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 1212011202120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23908551 + ... + 23959190.

It is an arithmetic number, because the mean of its divisors is an integer number (57082282335).

Almost surely, 2^{1212011202120} is an apocalyptic number.

1212011202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212011202120 is an abundant number, since it is smaller than the sum of its proper divisors (2441254867320).

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

1212011202120 is a wasteful number, since it uses less digits than its factorization.

1212011202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47867966 (or 47867962 counting only the distinct ones).

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

Adding to 1212011202120 its reverse (212021102121), we get a palindrome (1424032304241).

Subtracting from 1212011202120 its reverse (212021102121), we obtain a palindrome (999990099999).

The spelling of 1212011202120 in words is "one trillion, two hundred twelve billion, eleven million, two hundred two thousand, one hundred twenty".