1272100500000 has 1008 divisors, whose sum is σ = 5098209742080. Its totient is φ = 298080000000.

The previous prime is 1272100499963. The next prime is 1272100500019. The reversal of 1272100500000 is 50012721.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 1534499586 + ... + 1534500414.

It is an arithmetic number, because the mean of its divisors is an integer number (5057747760).

Almost surely, 2^{1272100500000} is an apocalyptic number.

1272100500000 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 1272100500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2549104871040).

1272100500000 is an abundant number, since it is smaller than the sum of its proper divisors (3826109242080).

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

1272100500000 is an equidigital number, since it uses as much as digits as its factorization.

1272100500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

Adding to 1272100500000 its reverse (50012721), we get a palindrome (1272150512721).

The spelling of 1272100500000 in words is "one trillion, two hundred seventy-two billion, one hundred million, five hundred thousand".