12320110981 has 2 divisors, whose sum is σ = 12320110982. Its totient is φ = 12320110980.

The previous prime is 12320110973. The next prime is 12320110991. The reversal of 12320110981 is 18901102321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12167193025 + 152917956 = 110305^2 + 12366^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320110981 - 2³ = 12320110973 is a prime.

It is a super-2 number, since 2×12320110981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320110991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160055490 + 6160055491.

It is an arithmetic number, because the mean of its divisors is an integer number (6160055491).

Almost surely, 2^12320110981 is an apocalyptic number.

It is an amenable number.

12320110981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320110981 is an equidigital number, since it uses as much as digits as its factorization.

12320110981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 12320110981 in words is "twelve billion, three hundred twenty million, one hundred ten thousand, nine hundred eighty-one".