1231214251 has 2 divisors, whose sum is σ = 1231214252. Its totient is φ = 1231214250.

The previous prime is 1231214203. The next prime is 1231214261. The reversal of 1231214251 is 1524121321.

It is a strong prime.

It is an emirp because it is prime and its reverse (1524121321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231214251 - 2²⁹ = 694343339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231214261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615607125 + 615607126.

It is an arithmetic number, because the mean of its divisors is an integer number (615607126).

Almost surely, 2^1231214251 is an apocalyptic number.

1231214251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231214251 is an equidigital number, since it uses as much as digits as its factorization.

1231214251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 1231214251 is about 35088.6627131899. The cubic root of 1231214251 is about 1071.7937278898.

Adding to 1231214251 its reverse (1524121321), we get a palindrome (2755335572).

The spelling of 1231214251 in words is "one billion, two hundred thirty-one million, two hundred fourteen thousand, two hundred fifty-one".