1212136699 has 2 divisors, whose sum is σ = 1212136700. Its totient is φ = 1212136698.

The previous prime is 1212136663. The next prime is 1212136727. The reversal of 1212136699 is 9966312121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9966312121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212136699 - 2¹⁹ = 1211612411 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212136609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606068349 + 606068350.

It is an arithmetic number, because the mean of its divisors is an integer number (606068350).

Almost surely, 2^1212136699 is an apocalyptic number.

1212136699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212136699 is an equidigital number, since it uses as much as digits as its factorization.

1212136699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 1212136699 is about 34815.7536037926. The cubic root of 1212136699 is about 1066.2291051770.

The spelling of 1212136699 in words is "one billion, two hundred twelve million, one hundred thirty-six thousand, six hundred ninety-nine".