15294021121 has 2 divisors, whose sum is σ = 15294021122. Its totient is φ = 15294021120.

The previous prime is 15294021053. The next prime is 15294021133. The reversal of 15294021121 is 12112049251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15268062096 + 25959025 = 123564^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 15294021121 - 2³¹ = 13146537473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15294021121.

It is not a weakly prime, because it can be changed into another prime (15294721121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7647010560 + 7647010561.

It is an arithmetic number, because the mean of its divisors is an integer number (7647010561).

Almost surely, 2^15294021121 is an apocalyptic number.

It is an amenable number.

15294021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15294021121 is an equidigital number, since it uses as much as digits as its factorization.

15294021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 15294021121 in words is "fifteen billion, two hundred ninety-four million, twenty-one thousand, one hundred twenty-one".