121912949 has 12 divisors (see below), whose sum is σ = 134270496. Its totient is φ = 110467368.

The previous prime is 121912943. The next prime is 121912951. The reversal of 121912949 is 949219121.

It is not a de Polignac number, because 121912949 - 2¹⁶ = 121847413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121912943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 962 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (11189208).

Almost surely, 2^121912949 is an apocalyptic number.

121912949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121912949 is a deficient number, since it is larger than the sum of its proper divisors (12357547).

121912949 is a wasteful number, since it uses less digits than its factorization.

121912949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14744 (or 14725 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 121912949 is about 11041.4197003827. The cubic root of 121912949 is about 495.8495752763.

The spelling of 121912949 in words is "one hundred twenty-one million, nine hundred twelve thousand, nine hundred forty-nine".