121836251 has 2 divisors, whose sum is σ = 121836252. Its totient is φ = 121836250.

The previous prime is 121836223. The next prime is 121836269. The reversal of 121836251 is 152638121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121836251 - 2¹⁰ = 121835227 is a prime.

It is not a weakly prime, because it can be changed into another prime (121836271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60918125 + 60918126.

It is an arithmetic number, because the mean of its divisors is an integer number (60918126).

Almost surely, 2^121836251 is an apocalyptic number.

121836251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121836251 is an equidigital number, since it uses as much as digits as its factorization.

121836251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 121836251 is about 11037.9459592806. The cubic root of 121836251 is about 495.7455703309.

The spelling of 121836251 in words is "one hundred twenty-one million, eight hundred thirty-six thousand, two hundred fifty-one".