121840951 has 2 divisors, whose sum is σ = 121840952. Its totient is φ = 121840950.

The previous prime is 121840937. The next prime is 121840987. The reversal of 121840951 is 159048121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (159048121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121840951 - 2¹⁷ = 121709879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121840931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60920475 + 60920476.

It is an arithmetic number, because the mean of its divisors is an integer number (60920476).

Almost surely, 2^121840951 is an apocalyptic number.

121840951 is a deficient number, since it is larger than the sum of its proper divisors (1).

121840951 is an equidigital number, since it uses as much as digits as its factorization.

121840951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 121840951 is about 11038.1588591576. The cubic root of 121840951 is about 495.7519449367.

The spelling of 121840951 in words is "one hundred twenty-one million, eight hundred forty thousand, nine hundred fifty-one".