121522 has 4 divisors (see below), whose sum is σ = 182286. Its totient is φ = 60760.

The previous prime is 121507. The next prime is 121523. The reversal of 121522 is 225121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225121 = 13 ⋅17317.

It can be written as a sum of positive squares in only one way, i.e., 77841 + 43681 = 279^2 + 209^2 .

It is not an unprimeable number, because it can be changed into a prime (121523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30379 + ... + 30382.

2¹²¹⁵²² is an apocalyptic number.

121522 is a deficient number, since it is larger than the sum of its proper divisors (60764).

121522 is an equidigital number, since it uses as much as digits as its factorization.

121522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60763.

The product of its digits is 40, while the sum is 13.

The square root of 121522 is about 348.6000573723. The cubic root of 121522 is about 49.5318979522.

Adding to 121522 its reverse (225121), we get a palindrome (346643).

The spelling of 121522 in words is "one hundred twenty-one thousand, five hundred twenty-two".