1100020031 has 4 divisors (see below), whose sum is σ = 1200021864. Its totient is φ = 1000018200.

The previous prime is 1100020021. The next prime is 1100020039. The reversal of 1100020031 is 1300200011.

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 1100020031 - 2¹⁴ = 1100003647 is a prime.

It is a super-2 number, since 2×1100020031² = 2420088137202481922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100020039) 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, 50000900 + ... + 50000921.

It is an arithmetic number, because the mean of its divisors is an integer number (300005466).

Almost surely, 2^1100020031 is an apocalyptic number.

1100020031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1100020031 is a deficient number, since it is larger than the sum of its proper divisors (100001833).

1100020031 is a wasteful number, since it uses less digits than its factorization.

1100020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100001832.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1100020031 is about 33166.5498808664. The cubic root of 1100020031 is about 1032.2863813586.

Adding to 1100020031 its reverse (1300200011), we get a palindrome (2400220042).

The spelling of 1100020031 in words is "one billion, one hundred million, twenty thousand, thirty-one".