126722122 has 4 divisors (see below), whose sum is σ = 190083186. Its totient is φ = 63361060.

The previous prime is 126722117. The next prime is 126722129. The reversal of 126722122 is 221227621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221227621 = 19 ⋅11643559.

It can be written as a sum of positive squares in only one way, i.e., 89889361 + 36832761 = 9481^2 + 6069^2 .

It is not an unprimeable number, because it can be changed into a prime (126722129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31680529 + ... + 31680532.

Almost surely, 2^126722122 is an apocalyptic number.

126722122 is a deficient number, since it is larger than the sum of its proper divisors (63361064).

126722122 is an equidigital number, since it uses as much as digits as its factorization.

126722122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63361063.

The product of its digits is 1344, while the sum is 25.

The square root of 126722122 is about 11257.0920756650. The cubic root of 126722122 is about 502.2856979148.

Adding to 126722122 its reverse (221227621), we get a palindrome (347949743).

The spelling of 126722122 in words is "one hundred twenty-six million, seven hundred twenty-two thousand, one hundred twenty-two".