134223021 has 8 divisors (see below), whose sum is σ = 198848960. Its totient is φ = 89481996.

The previous prime is 134223017. The next prime is 134223029. The reversal of 134223021 is 120322431.

It is not a de Polignac number, because 134223021 - 2² = 134223017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134222985 and 134223003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134223029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2485585 + ... + 2485638.

It is an arithmetic number, because the mean of its divisors is an integer number (24856120).

Almost surely, 2^134223021 is an apocalyptic number.

It is an amenable number.

134223021 is a deficient number, since it is larger than the sum of its proper divisors (64625939).

134223021 is an equidigital number, since it uses as much as digits as its factorization.

134223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971232 (or 4971226 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 134223021 is about 11585.4659379759. The cubic root of 134223021 is about 512.0067303091.

Adding to 134223021 its reverse (120322431), we get a palindrome (254545452).

The spelling of 134223021 in words is "one hundred thirty-four million, two hundred twenty-three thousand, twenty-one".