134642145221 has 4 divisors (see below), whose sum is σ = 134644048032. Its totient is φ = 134640242412.

The previous prime is 134642145161. The next prime is 134642145229. The reversal of 134642145221 is 122541246431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 134642145221 - 2³⁴ = 117462276037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134642145229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840995 + ... + 988208.

It is an arithmetic number, because the mean of its divisors is an integer number (33661012008).

Almost surely, 2^134642145221 is an apocalyptic number.

It is an amenable number.

134642145221 is a deficient number, since it is larger than the sum of its proper divisors (1902811).

134642145221 is an equidigital number, since it uses as much as digits as its factorization.

134642145221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902810.

The product of its digits is 46080, while the sum is 35.

The spelling of 134642145221 in words is "one hundred thirty-four billion, six hundred forty-two million, one hundred forty-five thousand, two hundred twenty-one".