17121040451 has 4 divisors (see below), whose sum is σ = 17583771312. Its totient is φ = 16658309592.

The previous prime is 17121040423. The next prime is 17121040471. The reversal of 17121040451 is 15404012171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15404012171 = 17 ⋅906118363.

It is a cyclic number.

It is not a de Polignac number, because 17121040451 - 2¹⁸ = 17120778307 is a prime.

It is a super-2 number, since 2×17121040451² (a number of 21 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 17121040451.

It is not an unprimeable number, because it can be changed into a prime (17121040471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231365375 + ... + 231365448.

It is an arithmetic number, because the mean of its divisors is an integer number (4395942828).

Almost surely, 2^17121040451 is an apocalyptic number.

17121040451 is a deficient number, since it is larger than the sum of its proper divisors (462730861).

17121040451 is an equidigital number, since it uses as much as digits as its factorization.

17121040451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462730860.

The product of its (nonzero) digits is 1120, while the sum is 26.

The spelling of 17121040451 in words is "seventeen billion, one hundred twenty-one million, forty thousand, four hundred fifty-one".