15121109453 has 2 divisors, whose sum is σ = 15121109454. Its totient is φ = 15121109452.

The previous prime is 15121109449. The next prime is 15121109491. The reversal of 15121109453 is 35490112151.

15121109453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12362548969 + 2758560484 = 111187^2 + 52522^2 .

It is a cyclic number.

It is not a de Polignac number, because 15121109453 - 2² = 15121109449 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15121109053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560554726 + 7560554727.

It is an arithmetic number, because the mean of its divisors is an integer number (7560554727).

Almost surely, 2^15121109453 is an apocalyptic number.

It is an amenable number.

15121109453 is a deficient number, since it is larger than the sum of its proper divisors (1).

15121109453 is an equidigital number, since it uses as much as digits as its factorization.

15121109453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 15121109453 in words is "fifteen billion, one hundred twenty-one million, one hundred nine thousand, four hundred fifty-three".