133859356121 has 8 divisors (see below), whose sum is σ = 134548516104. Its totient is φ = 133171678080.

The previous prime is 133859356067. The next prime is 133859356139. The reversal of 133859356121 is 121653958331.

It can be written as a sum of positive squares in 4 ways, for example, as 24423438400 + 109435917721 = 156280^2 + 330811^2 .

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 133859356121 - 2¹⁴ = 133859339737 is a prime.

It is a super-2 number, since 2×133859356121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133859356151) 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, 189140 + ... + 550901.

It is an arithmetic number, because the mean of its divisors is an integer number (16818564513).

Almost surely, 2^133859356121 is an apocalyptic number.

It is an amenable number.

133859356121 is a deficient number, since it is larger than the sum of its proper divisors (689159983).

133859356121 is an equidigital number, since it uses as much as digits as its factorization.

133859356121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740971.

The product of its digits is 583200, while the sum is 47.

The spelling of 133859356121 in words is "one hundred thirty-three billion, eight hundred fifty-nine million, three hundred fifty-six thousand, one hundred twenty-one".