1200100322100 has 72 divisors (see below), whose sum is σ = 3472923982528. Its totient is φ = 319968345600.

The previous prime is 1200100322077. The next prime is 1200100322123. The reversal of 1200100322100 is 12230010021.

It is an interprime number because it is at equal distance from previous prime (1200100322077) and next prime (1200100322123).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1294017 + ... + 2018583.

Almost surely, 2^{1200100322100} is an apocalyptic number.

1200100322100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200100322100 is an abundant number, since it is smaller than the sum of its proper divisors (2272823660428).

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

1200100322100 is a wasteful number, since it uses less digits than its factorization.

1200100322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730105 (or 730098 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1200100322100 its reverse (12230010021), we get a palindrome (1212330332121).

The spelling of 1200100322100 in words is "one trillion, two hundred billion, one hundred million, three hundred twenty-two thousand, one hundred".