121481681 has 2 divisors, whose sum is σ = 121481682. Its totient is φ = 121481680.

The previous prime is 121481641. The next prime is 121481713. The reversal of 121481681 is 186184121.

It is a happy number.

It is an a-pointer prime, because the next prime (121481713) can be obtained adding 121481681 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 39488656 = 9055^2 + 6284^2 .

It is an emirp because it is prime and its reverse (186184121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121481681 is a prime.

It is a super-2 number, since 2×121481681² = 29515597637171522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121481641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60740840 + 60740841.

It is an arithmetic number, because the mean of its divisors is an integer number (60740841).

Almost surely, 2^121481681 is an apocalyptic number.

It is an amenable number.

121481681 is a deficient number, since it is larger than the sum of its proper divisors (1).

121481681 is an equidigital number, since it uses as much as digits as its factorization.

121481681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 32.

The square root of 121481681 is about 11021.8728444852. The cubic root of 121481681 is about 495.2641938998.

The spelling of 121481681 in words is "one hundred twenty-one million, four hundred eighty-one thousand, six hundred eighty-one".