15121201 has 2 divisors, whose sum is σ = 15121202. Its totient is φ = 15121200.

The previous prime is 15121187. The next prime is 15121213. The reversal of 15121201 is 10212151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10732176 + 4389025 = 3276^2 + 2095^2 .

It is an emirp because it is prime and its reverse (10212151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15121201 - 2¹³ = 15113009 is a prime.

It is a super-3 number, since 3×15121201³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560600 + 7560601.

It is an arithmetic number, because the mean of its divisors is an integer number (7560601).

Almost surely, 2^15121201 is an apocalyptic number.

It is an amenable number.

15121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

15121201 is an equidigital number, since it uses as much as digits as its factorization.

15121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 15121201 is about 3888.5988479142. The cubic root of 15121201 is about 247.2836649893.

Adding to 15121201 its reverse (10212151), we get a palindrome (25333352).

The spelling of 15121201 in words is "fifteen million, one hundred twenty-one thousand, two hundred one".