133165621097 has 8 divisors (see below), whose sum is σ = 133538038920. Its totient is φ = 132793286400.

The previous prime is 133165621079. The next prime is 133165621111. The reversal of 133165621097 is 790126561331.

It can be written as a sum of positive squares in 4 ways, for example, as 38360747881 + 94804873216 = 195859^2 + 307904^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 133165621097 - 2²⁰ = 133164572521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133165621997) 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, 4611179 + ... + 4639967.

It is an arithmetic number, because the mean of its divisors is an integer number (16692254865).

Almost surely, 2^133165621097 is an apocalyptic number.

It is an amenable number.

133165621097 is a deficient number, since it is larger than the sum of its proper divisors (372417823).

133165621097 is a wasteful number, since it uses less digits than its factorization.

133165621097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41563.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 133165621097 in words is "one hundred thirty-three billion, one hundred sixty-five million, six hundred twenty-one thousand, ninety-seven".