134131023221 has 8 divisors (see below), whose sum is σ = 146427545880. Its totient is φ = 122117179392.

The previous prime is 134131023161. The next prime is 134131023251. The reversal of 134131023221 is 122320131431.

It can be written as a sum of positive squares in 4 ways, for example, as 8184820900 + 125946202321 = 90470^2 + 354889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-134131023221 is a prime.

It is a super-2 number, since 2×134131023221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134131023251) 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, 70668716 + ... + 70670613.

It is an arithmetic number, because the mean of its divisors is an integer number (18303443235).

Almost surely, 2^134131023221 is an apocalyptic number.

It is an amenable number.

134131023221 is a deficient number, since it is larger than the sum of its proper divisors (12296522659).

134131023221 is a wasteful number, since it uses less digits than its factorization.

134131023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141339415.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 134131023221 its reverse (122320131431), we get a palindrome (256451154652).

The spelling of 134131023221 in words is "one hundred thirty-four billion, one hundred thirty-one million, twenty-three thousand, two hundred twenty-one".