1201331055100 has 36 divisors (see below), whose sum is σ = 2843878245768. Its totient is φ = 436847656000.

The previous prime is 1201331055077. The next prime is 1201331055121. The reversal of 1201331055100 is 15501331021.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 11 ways as a sum of consecutive naturals, for example, 546058471 + ... + 546060670.

It is an arithmetic number, because the mean of its divisors is an integer number (78996617938).

Almost surely, 2^{1201331055100} is an apocalyptic number.

1201331055100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201331055100 is an abundant number, since it is smaller than the sum of its proper divisors (1642547190668).

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

1201331055100 is a wasteful number, since it uses less digits than its factorization.

1201331055100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092119166 (or 1092119159 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 1201331055100 its reverse (15501331021), we get a palindrome (1216832386121).

The spelling of 1201331055100 in words is "one trillion, two hundred one billion, three hundred thirty-one million, fifty-five thousand, one hundred".