133000021001 has 4 divisors (see below), whose sum is σ = 133970824212. Its totient is φ = 132029217792.

The previous prime is 133000020997. The next prime is 133000021003. The reversal of 133000021001 is 100120000331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27569281600 + 105430739401 = 166040^2 + 324701^2 .

It is a cyclic number.

It is not a de Polignac number, because 133000021001 - 2² = 133000020997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133000021003) 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, 485401400 + ... + 485401673.

It is an arithmetic number, because the mean of its divisors is an integer number (33492706053).

Almost surely, 2^133000021001 is an apocalyptic number.

It is an amenable number.

133000021001 is a deficient number, since it is larger than the sum of its proper divisors (970803211).

133000021001 is an equidigital number, since it uses as much as digits as its factorization.

133000021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970803210.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 133000021001 its reverse (100120000331), we get a palindrome (233120021332).

The spelling of 133000021001 in words is "one hundred thirty-three billion, twenty-one thousand, one".