1200105132500 has 30 divisors (see below), whose sum is σ = 2624389909218. Its totient is φ = 480042052000.

The previous prime is 1200105132481. The next prime is 1200105132509. The reversal of 1200105132500 is 52315010021.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 194950507024 + 1005154625476 = 441532^2 + 1002574^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200105132509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 240018527 + ... + 240023526.

Almost surely, 2^{1200105132500} is an apocalyptic number.

1200105132500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200105132500 is an abundant number, since it is smaller than the sum of its proper divisors (1424284776718).

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

1200105132500 is an equidigital number, since it uses as much as digits as its factorization.

1200105132500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480042077 (or 480042060 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The spelling of 1200105132500 in words is "one trillion, two hundred billion, one hundred five million, one hundred thirty-two thousand, five hundred".