11921216963 has 16 divisors (see below), whose sum is σ = 12879820800. Its totient is φ = 10999998240.

The previous prime is 11921216953. The next prime is 11921216971. The reversal of 11921216963 is 36961212911.

It is a cyclic number.

It is not a de Polignac number, because 11921216963 - 2¹⁰ = 11921215939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11921216963.

It is not an unprimeable number, because it can be changed into a prime (11921216903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813818 + ... + 828336.

It is an arithmetic number, because the mean of its divisors is an integer number (804988800).

Almost surely, 2^11921216963 is an apocalyptic number.

11921216963 is a deficient number, since it is larger than the sum of its proper divisors (958603837).

11921216963 is a wasteful number, since it uses less digits than its factorization.

11921216963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15802.

The product of its digits is 34992, while the sum is 41.

The spelling of 11921216963 in words is "eleven billion, nine hundred twenty-one million, two hundred sixteen thousand, nine hundred sixty-three".