110721881 has 2 divisors, whose sum is σ = 110721882. Its totient is φ = 110721880.

The previous prime is 110721857. The next prime is 110721883. The reversal of 110721881 is 188127011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 49632025 = 7816^2 + 7045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110721881 is a prime.

It is a super-2 number, since 2×110721881² = 24518669864356322, which contains 22 as substring.

Together with 110721883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (110721883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55360940 + 55360941.

It is an arithmetic number, because the mean of its divisors is an integer number (55360941).

Almost surely, 2^110721881 is an apocalyptic number.

It is an amenable number.

110721881 is a deficient number, since it is larger than the sum of its proper divisors (1).

110721881 is an equidigital number, since it uses as much as digits as its factorization.

110721881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 110721881 is about 10522.4465311067. The cubic root of 110721881 is about 480.1878330272.

Adding to 110721881 its reverse (188127011), we get a palindrome (298848892).

The spelling of 110721881 in words is "one hundred ten million, seven hundred twenty-one thousand, eight hundred eighty-one".