121917371 has 2 divisors, whose sum is σ = 121917372. Its totient is φ = 121917370.

The previous prime is 121917359. The next prime is 121917379. The reversal of 121917371 is 173719121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121917371 - 2⁶ = 121917307 is a prime.

It is not a weakly prime, because it can be changed into another prime (121917379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60958685 + 60958686.

It is an arithmetic number, because the mean of its divisors is an integer number (60958686).

Almost surely, 2^121917371 is an apocalyptic number.

121917371 is a deficient number, since it is larger than the sum of its proper divisors (1).

121917371 is an equidigital number, since it uses as much as digits as its factorization.

121917371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 32.

The square root of 121917371 is about 11041.6199445552. The cubic root of 121917371 is about 495.8555703199.

The spelling of 121917371 in words is "one hundred twenty-one million, nine hundred seventeen thousand, three hundred seventy-one".