121381847 has 2 divisors, whose sum is σ = 121381848. Its totient is φ = 121381846.

The previous prime is 121381831. The next prime is 121381859. The reversal of 121381847 is 748183121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121381847 - 2⁴ = 121381831 is a prime.

It is a super-2 number, since 2×121381847² = 29467105562262818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121384847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60690923 + 60690924.

It is an arithmetic number, because the mean of its divisors is an integer number (60690924).

Almost surely, 2^121381847 is an apocalyptic number.

121381847 is a deficient number, since it is larger than the sum of its proper divisors (1).

121381847 is an equidigital number, since it uses as much as digits as its factorization.

121381847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 121381847 is about 11017.3430100002. The cubic root of 121381847 is about 495.1284868649.

The spelling of 121381847 in words is "one hundred twenty-one million, three hundred eighty-one thousand, eight hundred forty-seven".