11212421399 has 2 divisors, whose sum is σ = 11212421400. Its totient is φ = 11212421398.

The previous prime is 11212421387. The next prime is 11212421447. The reversal of 11212421399 is 99312421211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212421399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212421329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606210699 + 5606210700.

It is an arithmetic number, because the mean of its divisors is an integer number (5606210700).

Almost surely, 2^11212421399 is an apocalyptic number.

11212421399 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212421399 is an equidigital number, since it uses as much as digits as its factorization.

11212421399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The spelling of 11212421399 in words is "eleven billion, two hundred twelve million, four hundred twenty-one thousand, three hundred ninety-nine".