1210000012120 has 16 divisors (see below), whose sum is σ = 2722500027360. Its totient is φ = 484000004832.

The previous prime is 1210000012103. The next prime is 1210000012171. The reversal of 1210000012120 is 212100000121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1210000012097 and 1210000012106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15125000112 + ... + 15125000191.

It is an arithmetic number, because the mean of its divisors is an integer number (170156251710).

Almost surely, 2^{1210000012120} is an apocalyptic number.

1210000012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210000012120 is an abundant number, since it is smaller than the sum of its proper divisors (1512500015240).

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

1210000012120 is a wasteful number, since it uses less digits than its factorization.

1210000012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30250000314 (or 30250000310 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1210000012120 its reverse (212100000121), we get a palindrome (1422100012241).

The spelling of 1210000012120 in words is "one trillion, two hundred ten billion, twelve thousand, one hundred twenty".