11051157021720 has 128 divisors (see below), whose sum is σ = 33253126525440. Its totient is φ = 2938119065600.

The previous prime is 11051157021679. The next prime is 11051157021727. The reversal of 11051157021720 is 2712075115011.

It is a super-2 number, since 2×11051157021720² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11051157021727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600564520 + ... + 600582920.

It is an arithmetic number, because the mean of its divisors is an integer number (259790050980).

Almost surely, 2^{11051157021720} is an apocalyptic number.

11051157021720 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 11051157021720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16626563262720).

11051157021720 is an abundant number, since it is smaller than the sum of its proper divisors (22201969503720).

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

11051157021720 is a wasteful number, since it uses less digits than its factorization.

11051157021720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33185 (or 33181 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 33.

The spelling of 11051157021720 in words is "eleven trillion, fifty-one billion, one hundred fifty-seven million, twenty-one thousand, seven hundred twenty".