12267108981 has 6 divisors (see below), whose sum is σ = 17719157430. Its totient is φ = 8178072648.

The previous prime is 12267108979. The next prime is 12267109007. The reversal of 12267108981 is 18980176221.

It can be written as a sum of positive squares in only one way, i.e., 11072300625 + 1194808356 = 105225^2 + 34566^2 .

It is not a de Polignac number, because 12267108981 - 2¹ = 12267108979 is a prime.

It is a super-2 number, since 2×12267108981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12267108881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 681506046 + ... + 681506063.

It is an arithmetic number, because the mean of its divisors is an integer number (2953192905).

Almost surely, 2^12267108981 is an apocalyptic number.

It is an amenable number.

12267108981 is a deficient number, since it is larger than the sum of its proper divisors (5452048449).

12267108981 is a wasteful number, since it uses less digits than its factorization.

12267108981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363012115 (or 1363012112 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 12267108981 in words is "twelve billion, two hundred sixty-seven million, one hundred eight thousand, nine hundred eighty-one".