122151121 has 2 divisors, whose sum is σ = 122151122. Its totient is φ = 122151120.

The previous prime is 122151083. The next prime is 122151151. The reversal of 122151121 is 121151221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 291600 = 11039^2 + 540^2 .

It is an emirp because it is prime and its reverse (121151221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122151121 - 2⁷ = 122150993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122151095 and 122151104.

It is not a weakly prime, because it can be changed into another prime (122151151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61075560 + 61075561.

It is an arithmetic number, because the mean of its divisors is an integer number (61075561).

Almost surely, 2^122151121 is an apocalyptic number.

It is an amenable number.

122151121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122151121 is an equidigital number, since it uses as much as digits as its factorization.

122151121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40, while the sum is 16.

The square root of 122151121 is about 11052.1998262789. The cubic root of 122151121 is about 496.1722663532.

The spelling of 122151121 in words is "one hundred twenty-two million, one hundred fifty-one thousand, one hundred twenty-one".