121471157 has 2 divisors, whose sum is σ = 121471158. Its totient is φ = 121471156.

The previous prime is 121471139. The next prime is 121471159. The reversal of 121471157 is 751174121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107972881 + 13498276 = 10391^2 + 3674^2 .

It is a cyclic number.

It is not a de Polignac number, because 121471157 - 2⁸ = 121470901 is a prime.

Together with 121471159, 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 (121471159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60735578 + 60735579.

It is an arithmetic number, because the mean of its divisors is an integer number (60735579).

Almost surely, 2^121471157 is an apocalyptic number.

It is an amenable number.

121471157 is a deficient number, since it is larger than the sum of its proper divisors (1).

121471157 is an equidigital number, since it uses as much as digits as its factorization.

121471157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 29.

The square root of 121471157 is about 11021.3954198187. The cubic root of 121471157 is about 495.2498918507.

The spelling of 121471157 in words is "one hundred twenty-one million, four hundred seventy-one thousand, one hundred fifty-seven".