11451554525021 has 8 divisors (see below), whose sum is σ = 13057881178104. Its totient is φ = 9948861849600.

The previous prime is 11451554525009. The next prime is 11451554525041. The reversal of 11451554525021 is 12052545515411.

It can be written as a sum of positive squares in 4 ways, for example, as 355527180121 + 11096027344900 = 596261^2 + 3331070^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11451554525021 - 2³⁸ = 11176676618077 is a prime.

It is a super-2 number, since 2×11451554525021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11451554525021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451554525041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25908494180 + ... + 25908494621.

It is an arithmetic number, because the mean of its divisors is an integer number (1632235147263).

Almost surely, 2^{11451554525021} is an apocalyptic number.

It is an amenable number.

11451554525021 is a deficient number, since it is larger than the sum of its proper divisors (1606326653083).

11451554525021 is a wasteful number, since it uses less digits than its factorization.

11451554525021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51816988831.

The product of its (nonzero) digits is 200000, while the sum is 41.

The spelling of 11451554525021 in words is "eleven trillion, four hundred fifty-one billion, five hundred fifty-four million, five hundred twenty-five thousand, twenty-one".