1212133451 has 2 divisors, whose sum is σ = 1212133452. Its totient is φ = 1212133450.

The previous prime is 1212133427. The next prime is 1212133457. The reversal of 1212133451 is 1543312121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212133451 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1212133457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606066725 + 606066726.

It is an arithmetic number, because the mean of its divisors is an integer number (606066726).

Almost surely, 2^1212133451 is an apocalyptic number.

1212133451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212133451 is an equidigital number, since it uses as much as digits as its factorization.

1212133451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 1212133451 is about 34815.7069582107. The cubic root of 1212133451 is about 1066.2281528325.

Adding to 1212133451 its reverse (1543312121), we get a palindrome (2755445572).

The spelling of 1212133451 in words is "one billion, two hundred twelve million, one hundred thirty-three thousand, four hundred fifty-one".