122106157 has 2 divisors, whose sum is σ = 122106158. Its totient is φ = 122106156.

The previous prime is 122106139. The next prime is 122106161. The reversal of 122106157 is 751601221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101485476 + 20620681 = 10074^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 122106157 - 2⁷ = 122106029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122106167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61053078 + 61053079.

It is an arithmetic number, because the mean of its divisors is an integer number (61053079).

Almost surely, 2^122106157 is an apocalyptic number.

It is an amenable number.

122106157 is a deficient number, since it is larger than the sum of its proper divisors (1).

122106157 is an equidigital number, since it uses as much as digits as its factorization.

122106157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 122106157 is about 11050.1654738741. The cubic root of 122106157 is about 496.1113783111. Note that the first 3 decimals are identical.

Adding to 122106157 its reverse (751601221), we get a palindrome (873707378).

The spelling of 122106157 in words is "one hundred twenty-two million, one hundred six thousand, one hundred fifty-seven".