201001213331 has 4 divisors (see below), whose sum is σ = 201687224592. Its totient is φ = 200315202072.

The previous prime is 201001213327. The next prime is 201001213333. The reversal of 201001213331 is 133312100102.

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

It is a cyclic number.

It is not a de Polignac number, because 201001213331 - 2² = 201001213327 is a prime.

It is a super-2 number, since 2×201001213331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201001213333) 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, 343005191 + ... + 343005776.

It is an arithmetic number, because the mean of its divisors is an integer number (50421806148).

Almost surely, 2^201001213331 is an apocalyptic number.

201001213331 is a deficient number, since it is larger than the sum of its proper divisors (686011261).

201001213331 is an equidigital number, since it uses as much as digits as its factorization.

201001213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686011260.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 201001213331 its reverse (133312100102), we get a palindrome (334313313433).

The spelling of 201001213331 in words is "two hundred one billion, one million, two hundred thirteen thousand, three hundred thirty-one".