129126022 has 4 divisors (see below), whose sum is σ = 193689036. Its totient is φ = 64563010.

The previous prime is 129126017. The next prime is 129126047. The reversal of 129126022 is 220621921.

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

It is a super-3 number, since 3×129126022³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32281504 + ... + 32281507.

It is an arithmetic number, because the mean of its divisors is an integer number (48422259).

Almost surely, 2^129126022 is an apocalyptic number.

129126022 is a deficient number, since it is larger than the sum of its proper divisors (64563014).

129126022 is an equidigital number, since it uses as much as digits as its factorization.

129126022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64563013.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 129126022 is about 11363.3631465337. The cubic root of 129126022 is about 505.4419188262.

Adding to 129126022 its reverse (220621921), we get a palindrome (349747943).

The spelling of 129126022 in words is "one hundred twenty-nine million, one hundred twenty-six thousand, twenty-two".