11862289921 has 8 divisors (see below), whose sum is σ = 11971361160. Its totient is φ = 11753290752.

The previous prime is 11862289919. The next prime is 11862289939. The reversal of 11862289921 is 12998226811.

It can be written as a sum of positive squares in 4 ways, for example, as 147258225 + 11715031696 = 12135^2 + 108236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11862289921 - 2¹ = 11862289919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11862289981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346261 + ... + 378973.

It is an arithmetic number, because the mean of its divisors is an integer number (1496420145).

Almost surely, 2^11862289921 is an apocalyptic number.

It is an amenable number.

11862289921 is a deficient number, since it is larger than the sum of its proper divisors (109071239).

11862289921 is a wasteful number, since it uses less digits than its factorization.

11862289921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36035.

The product of its digits is 248832, while the sum is 49.

The spelling of 11862289921 in words is "eleven billion, eight hundred sixty-two million, two hundred eighty-nine thousand, nine hundred twenty-one".