1200122001020 has 96 divisors (see below), whose sum is σ = 2623514842368. Its totient is φ = 460781714432.

The previous prime is 1200122000981. The next prime is 1200122001031. The reversal of 1200122001020 is 201002210021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1200122000992 and 1200122001010.

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 31 ways as a sum of consecutive naturals, for example, 225034274 + ... + 225039606.

It is an arithmetic number, because the mean of its divisors is an integer number (27328279608).

Almost surely, 2^{1200122001020} is an apocalyptic number.

1200122001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200122001020 is an abundant number, since it is smaller than the sum of its proper divisors (1423392841348).

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

1200122001020 is a wasteful number, since it uses less digits than its factorization.

1200122001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9959 (or 9957 counting only the distinct ones).

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

Adding to 1200122001020 its reverse (201002210021), we get a palindrome (1401124211041).

The spelling of 1200122001020 in words is "one trillion, two hundred billion, one hundred twenty-two million, one thousand, twenty".