20122 has 4 divisors (see below), whose sum is σ = 30186. Its totient is φ = 10060.

The previous prime is 20117. The next prime is 20123. The reversal of 20122 is 22102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16641 + 3481 = 129^2 + 59^2 .

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (20123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5029 + ... + 5032.

2²⁰¹²² is an apocalyptic number.

20122 is a deficient number, since it is larger than the sum of its proper divisors (10064).

20122 is a wasteful number, since it uses less digits than its factorization.

20122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 20122 is about 141.8520355864. The cubic root of 20122 is about 27.1992574768.

Adding to 20122 its reverse (22102), we get a palindrome (42224).

The spelling of 20122 in words is "twenty thousand, one hundred twenty-two", and thus it is an iban number.