121978323 has 6 divisors (see below), whose sum is σ = 176190924. Its totient is φ = 81318876.

The previous prime is 121978313. The next prime is 121978331. The reversal of 121978323 is 323879121.

It is not a de Polignac number, because 121978323 - 2¹³ = 121970131 is a prime.

It is a super-2 number, since 2×121978323² = 29757422563784658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121978313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6776565 + ... + 6776582.

It is an arithmetic number, because the mean of its divisors is an integer number (29365154).

Almost surely, 2^121978323 is an apocalyptic number.

121978323 is a deficient number, since it is larger than the sum of its proper divisors (54212601).

121978323 is a wasteful number, since it uses less digits than its factorization.

121978323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13553153 (or 13553150 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 121978323 is about 11044.3797019117. The cubic root of 121978323 is about 495.9381900844.

The spelling of 121978323 in words is "one hundred twenty-one million, nine hundred seventy-eight thousand, three hundred twenty-three".