1212001320120 has 32 divisors (see below), whose sum is σ = 3636003960720. Its totient is φ = 323200352000.

The previous prime is 1212001320077. The next prime is 1212001320137. The reversal of 1212001320120 is 210231002121.

It is a hoax number, since the sum of its digits (15) coincides with the sum of the digits of its distinct prime factors.

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 1212001320120.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5050005381 + ... + 5050005620.

Almost surely, 2^{1212001320120} is an apocalyptic number.

1212001320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212001320120 is an abundant number, since it is smaller than the sum of its proper divisors (2424002640600).

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

1212001320120 is a wasteful number, since it uses less digits than its factorization.

1212001320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100011015 (or 10100011011 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1212001320120 its reverse (210231002121), we get a palindrome (1422232322241).

The spelling of 1212001320120 in words is "one trillion, two hundred twelve billion, one million, three hundred twenty thousand, one hundred twenty".