1001213331 has 8 divisors (see below), whose sum is σ = 1336469904. Its totient is φ = 666716160.

The previous prime is 1001213329. The next prime is 1001213347. The reversal of 1001213331 is 1333121001.

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

It is not a de Polignac number, because 1001213331 - 2¹ = 1001213329 is a prime.

It is a super-2 number, since 2×1001213331² = 2004856268344231122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1001213331.

It is not an unprimeable number, because it can be changed into a prime (1001215331) 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, 186766 + ... + 192051.

It is an arithmetic number, because the mean of its divisors is an integer number (167058738).

Almost surely, 2^1001213331 is an apocalyptic number.

1001213331 is a deficient number, since it is larger than the sum of its proper divisors (335256573).

1001213331 is an equidigital number, since it uses as much as digits as its factorization.

1001213331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379701.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1001213331 is about 31641.9552335187. The cubic root of 1001213331 is about 1000.4042802022.

Adding to 1001213331 its reverse (1333121001), we get a palindrome (2334334332).

The spelling of 1001213331 in words is "one billion, one million, two hundred thirteen thousand, three hundred thirty-one".