1512121231 has 2 divisors, whose sum is σ = 1512121232. Its totient is φ = 1512121230.

The previous prime is 1512121199. The next prime is 1512121243. The reversal of 1512121231 is 1321212151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1512121231 - 2⁵ = 1512121199 is a prime.

It is a super-2 number, since 2×1512121231² = 4573021234481910722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1512121199 and 1512121208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1512121031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756060615 + 756060616.

It is an arithmetic number, because the mean of its divisors is an integer number (756060616).

Almost surely, 2^1512121231 is an apocalyptic number.

1512121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512121231 is an equidigital number, since it uses as much as digits as its factorization.

1512121231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 1512121231 is about 38886.0030216529. The cubic root of 1512121231 is about 1147.7893843146.

Adding to 1512121231 its reverse (1321212151), we get a palindrome (2833333382).

The spelling of 1512121231 in words is "one billion, five hundred twelve million, one hundred twenty-one thousand, two hundred thirty-one".