1200012020120 has 128 divisors (see below), whose sum is σ = 2866096742400. Its totient is φ = 450626304000.

The previous prime is 1200012020101. The next prime is 1200012020131. The reversal of 1200012020120 is 210202100021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759981491 + ... + 759983069.

It is an arithmetic number, because the mean of its divisors is an integer number (22391380800).

Almost surely, 2^{1200012020120} is an apocalyptic number.

1200012020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200012020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1433048371200).

1200012020120 is an abundant number, since it is smaller than the sum of its proper divisors (1666084722280).

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

1200012020120 is a wasteful number, since it uses less digits than its factorization.

1200012020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3725 counting only the distinct ones).

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

Adding to 1200012020120 its reverse (210202100021), we get a palindrome (1410214120141).

The spelling of 1200012020120 in words is "one trillion, two hundred billion, twelve million, twenty thousand, one hundred twenty".