121047149 has 2 divisors, whose sum is σ = 121047150. Its totient is φ = 121047148.

The previous prime is 121047103. The next prime is 121047151. The reversal of 121047149 is 941740121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119137225 + 1909924 = 10915^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 121047149 - 2²⁰ = 119998573 is a prime.

Together with 121047151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121047169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60523574 + 60523575.

It is an arithmetic number, because the mean of its divisors is an integer number (60523575).

Almost surely, 2^121047149 is an apocalyptic number.

It is an amenable number.

121047149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121047149 is an equidigital number, since it uses as much as digits as its factorization.

121047149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 121047149 is about 11002.1429276301. The cubic root of 121047149 is about 494.6729792542.

The spelling of 121047149 in words is "one hundred twenty-one million, forty-seven thousand, one hundred forty-nine".