11142521399 has 4 divisors (see below), whose sum is σ = 11443670664. Its totient is φ = 10841372136.

The previous prime is 11142521387. The next prime is 11142521407. The reversal of 11142521399 is 99312524111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11142521399 - 2¹² = 11142517303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142521359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150574577 + ... + 150574650.

It is an arithmetic number, because the mean of its divisors is an integer number (2860917666).

Almost surely, 2^11142521399 is an apocalyptic number.

11142521399 is a deficient number, since it is larger than the sum of its proper divisors (301149265).

11142521399 is an equidigital number, since it uses as much as digits as its factorization.

11142521399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301149264.

The product of its digits is 19440, while the sum is 38.

The spelling of 11142521399 in words is "eleven billion, one hundred forty-two million, five hundred twenty-one thousand, three hundred ninety-nine".