11451520121 has 8 divisors (see below), whose sum is σ = 11610703104. Its totient is φ = 11293260480.

The previous prime is 11451520109. The next prime is 11451520133. The reversal of 11451520121 is 12102515411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11451520109) and next prime (11451520133).

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 11451520121 - 2³⁰ = 10377778297 is a prime.

It is a super-2 number, since 2×11451520121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11451520021) 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, 205841 + ... + 255486.

It is an arithmetic number, because the mean of its divisors is an integer number (1451337888).

Almost surely, 2^11451520121 is an apocalyptic number.

It is an amenable number.

11451520121 is a deficient number, since it is larger than the sum of its proper divisors (159182983).

11451520121 is a wasteful number, since it uses less digits than its factorization.

11451520121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461671.

The product of its (nonzero) digits is 400, while the sum is 23.

The spelling of 11451520121 in words is "eleven billion, four hundred fifty-one million, five hundred twenty thousand, one hundred twenty-one".