1103001021 has 12 divisors (see below), whose sum is σ = 1686942972. Its totient is φ = 692078976.

The previous prime is 1103001017. The next prime is 1103001037. The reversal of 1103001021 is 1201003011.

It can be written as a sum of positive squares in 2 ways, for example, as 484484121 + 618516900 = 22011^2 + 24870^2 .

It is not a de Polignac number, because 1103001021 - 2² = 1103001017 is a prime.

It is a super-2 number, since 2×1103001021² = 2433222504654084882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1103000994 and 1103001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103001061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3604426 + ... + 3604731.

It is an arithmetic number, because the mean of its divisors is an integer number (140578581).

Almost surely, 2^1103001021 is an apocalyptic number.

It is an amenable number.

1103001021 is a deficient number, since it is larger than the sum of its proper divisors (583941951).

1103001021 is a wasteful number, since it uses less digits than its factorization.

1103001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209180 (or 7209177 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1103001021 is about 33211.4591820353. The cubic root of 1103001021 is about 1033.2180188929.

Adding to 1103001021 its reverse (1201003011), we get a palindrome (2304004032).

The spelling of 1103001021 in words is "one billion, one hundred three million, one thousand, twenty-one".