11271721635900 has 1152 divisors, whose sum is σ = 42127853644800. Its totient is φ = 2560481280000.

The previous prime is 11271721635893. The next prime is 11271721635901. The reversal of 11271721635900 is 953612717211.

11271721635900 is a `hidden beast` number, since 1 + 1 + 2 + 7 + 1 + 7 + 2 + 1 + 635 + 9 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271721635901) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3194025336 + ... + 3194028864.

It is an arithmetic number, because the mean of its divisors is an integer number (36569317400).

Almost surely, 2^{11271721635900} is an apocalyptic number.

11271721635900 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 11271721635900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21063926822400).

11271721635900 is an abundant number, since it is smaller than the sum of its proper divisors (30856132008900).

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

11271721635900 is a wasteful number, since it uses less digits than its factorization.

11271721635900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 11271721635900 in words is "eleven trillion, two hundred seventy-one billion, seven hundred twenty-one million, six hundred thirty-five thousand, nine hundred".