1002111331 has 8 divisors (see below), whose sum is σ = 1083831840. Its totient is φ = 921052992.

The previous prime is 1002111277. The next prime is 1002111361. The reversal of 1002111331 is 1331112001.

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 1002111331 - 2⁷ = 1002111203 is a prime.

It is a super-2 number, since 2×1002111331² = 2008454239437183122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1002111361) 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, 162391 + ... + 168448.

It is an arithmetic number, because the mean of its divisors is an integer number (135478980).

Almost surely, 2^1002111331 is an apocalyptic number.

1002111331 is a deficient number, since it is larger than the sum of its proper divisors (81720509).

1002111331 is a wasteful number, since it uses less digits than its factorization.

1002111331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331085.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1002111331 is about 31656.1420738535. The cubic root of 1002111331 is about 1000.7032822781.

Adding to 1002111331 its reverse (1331112001), we get a palindrome (2333223332).

The spelling of 1002111331 in words is "one billion, two million, one hundred eleven thousand, three hundred thirty-one".