121711949 has 2 divisors, whose sum is σ = 121711950. Its totient is φ = 121711948.

The previous prime is 121711943. The next prime is 121711979. The reversal of 121711949 is 949117121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112741924 + 8970025 = 10618^2 + 2995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121711949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121711943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60855974 + 60855975.

It is an arithmetic number, because the mean of its divisors is an integer number (60855975).

Almost surely, 2^121711949 is an apocalyptic number.

It is an amenable number.

121711949 is a deficient number, since it is larger than the sum of its proper divisors (1).

121711949 is an equidigital number, since it uses as much as digits as its factorization.

121711949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 35.

The square root of 121711949 is about 11032.3138552164. The cubic root of 121711949 is about 495.5769201038.

The spelling of 121711949 in words is "one hundred twenty-one million, seven hundred eleven thousand, nine hundred forty-nine".