134120021 has 16 divisors (see below), whose sum is σ = 163918080. Its totient is φ = 107116800.

The previous prime is 134120017. The next prime is 134120047. The reversal of 134120021 is 120021431.

It is not a de Polignac number, because 134120021 - 2² = 134120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134119978 and 134120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134120071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6440 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (10244880).

Almost surely, 2^134120021 is an apocalyptic number.

It is an amenable number.

134120021 is a deficient number, since it is larger than the sum of its proper divisors (29798059).

134120021 is a wasteful number, since it uses less digits than its factorization.

134120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11284.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 134120021 is about 11581.0198600987. The cubic root of 134120021 is about 511.8757289645.

Adding to 134120021 its reverse (120021431), we get a palindrome (254141452).

The spelling of 134120021 in words is "one hundred thirty-four million, one hundred twenty thousand, twenty-one".