121131149 has 2 divisors, whose sum is σ = 121131150. Its totient is φ = 121131148.

The previous prime is 121131121. The next prime is 121131151. The reversal of 121131149 is 941131121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 10355524 = 10525^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 121131149 - 2¹² = 121127053 is a prime.

Together with 121131151, 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 (121131349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565574 + 60565575.

It is an arithmetic number, because the mean of its divisors is an integer number (60565575).

Almost surely, 2^121131149 is an apocalyptic number.

It is an amenable number.

121131149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131149 is an equidigital number, since it uses as much as digits as its factorization.

121131149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 23.

The square root of 121131149 is about 11005.9597037242. The cubic root of 121131149 is about 494.7873779894.

The spelling of 121131149 in words is "one hundred twenty-one million, one hundred thirty-one thousand, one hundred forty-nine".