15112121 has 2 divisors, whose sum is σ = 15112122. Its totient is φ = 15112120.

The previous prime is 15112117. The next prime is 15112129. The reversal of 15112121 is 12121151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 212521 = 3860^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 15112121 - 2² = 15112117 is a prime.

It is a super-2 number, since 2×15112121² = 456752402237282, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15112096 and 15112105.

It is not a weakly prime, because it can be changed into another prime (15112129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7556060 + 7556061.

It is an arithmetic number, because the mean of its divisors is an integer number (7556061).

Almost surely, 2^15112121 is an apocalyptic number.

It is an amenable number.

15112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15112121 is an equidigital number, since it uses as much as digits as its factorization.

15112121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20, while the sum is 14.

The square root of 15112121 is about 3887.4311569467. The cubic root of 15112121 is about 247.2341586647.

Adding to 15112121 its reverse (12121151), we get a palindrome (27233272).

The spelling of 15112121 in words is "fifteen million, one hundred twelve thousand, one hundred twenty-one".