• 122 can be written using four 4's:

122 has 4 divisors (see below), whose sum is σ = 186. Its totient is φ = 60.

The previous prime is 113. The next prime is 127. The reversal of 122 is 221.

Added to its reverse (221) it gives a cube (343 = 7^{3}).

122 is nontrivially palindromic in base 11.

It is a Cunningham number, because it is equal to 11^{2}+1.

122 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221 = 13 ⋅17.

It can be written as a sum of positive squares in only one way, i.e., 121 + 1 = 11^2 + 1^2 .

It is a fibodiv number, since the Fibonacci-like sequence with seeds 12 and 2 contains 122 itself.

It is a nude number because it is divisible by every one of its digits.

122 is an undulating number in base 11.

It is a plaindrome in base 3, base 7, base 9, base 10, base 14 and base 16.

It is a nialpdrome in base 5, base 6, base 12, base 13 and base 15.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29 + ... + 32.

122 is a deficient number, since it is larger than the sum of its proper divisors (64).

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

122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63.

The product of its digits is 4, while the sum is 5.

The square root of 122 is about 11.0453610172. The cubic root of 122 is about 4.9596756638.

Adding to 122 its reverse (221), we get a palindrome (343).

Subtracting 122 from its reverse (221), we obtain a palindrome (99).

Multiplying 122 by its reverse (221), we get a palindrome (26962).

The spelling of 122 in words is "one hundred twenty-two", and thus it is an aban number and an iban number.

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