121849181 has 2 divisors, whose sum is σ = 121849182. Its totient is φ = 121849180.

The previous prime is 121849163. The next prime is 121849201. The reversal of 121849181 is 181948121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85729081 + 36120100 = 9259^2 + 6010^2 .

It is an emirp because it is prime and its reverse (181948121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121849181 - 2¹⁴ = 121832797 is a prime.

It is a super-2 number, since 2×121849181² = 29694445820741522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121849151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60924590 + 60924591.

It is an arithmetic number, because the mean of its divisors is an integer number (60924591).

Almost surely, 2^121849181 is an apocalyptic number.

It is an amenable number.

121849181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121849181 is an equidigital number, since it uses as much as digits as its factorization.

121849181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 35.

The square root of 121849181 is about 11038.5316505412. The cubic root of 121849181 is about 495.7631068836.

The spelling of 121849181 in words is "one hundred twenty-one million, eight hundred forty-nine thousand, one hundred eighty-one".