11921399095 has 12 divisors (see below), whose sum is σ = 14329556424. Its totient is φ = 9521217360.

The previous prime is 11921399057. The next prime is 11921399111. The reversal of 11921399095 is 59099312911.

It is a happy number.

11921399095 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11921399095 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7607002 + ... + 7608568.

It is an arithmetic number, because the mean of its divisors is an integer number (1194129702).

Almost surely, 2^11921399095 is an apocalyptic number.

11921399095 is a deficient number, since it is larger than the sum of its proper divisors (2408157329).

11921399095 is an frugal number, since it uses more digits than its factorization.

11921399095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 49.

The spelling of 11921399095 in words is "eleven billion, nine hundred twenty-one million, three hundred ninety-nine thousand, ninety-five".