11312121299 has 2 divisors, whose sum is σ = 11312121300. Its totient is φ = 11312121298.

The previous prime is 11312121287. The next prime is 11312121313. The reversal of 11312121299 is 99212121311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312121299 - 2¹⁶ = 11312055763 is a prime.

It is not a weakly prime, because it can be changed into another prime (11312111299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656060649 + 5656060650.

It is an arithmetic number, because the mean of its divisors is an integer number (5656060650).

Almost surely, 2^11312121299 is an apocalyptic number.

11312121299 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312121299 is an equidigital number, since it uses as much as digits as its factorization.

11312121299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 32.

It can be divided in two parts, 113121212 and 99, that added together give a palindrome (113121311).

The spelling of 11312121299 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, two hundred ninety-nine".