1100103021 has 48 divisors (see below), whose sum is σ = 1725272640. Its totient is φ = 673194240.

The previous prime is 1100102989. The next prime is 1100103049. The reversal of 1100103021 is 1203010011.

It is not a de Polignac number, because 1100103021 - 2⁵ = 1100102989 is a prime.

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 = 1100102994 and 1100103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100103061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1212450 + ... + 1213356.

It is an arithmetic number, because the mean of its divisors is an integer number (35943180).

Almost surely, 2^1100103021 is an apocalyptic number.

It is an amenable number.

1100103021 is a deficient number, since it is larger than the sum of its proper divisors (625169619).

1100103021 is a wasteful number, since it uses less digits than its factorization.

1100103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146 (or 1143 counting only the distinct ones).

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

The square root of 1100103021 is about 33167.8009672031. The cubic root of 1100103021 is about 1032.3123406715.

Adding to 1100103021 its reverse (1203010011), we get a palindrome (2303113032).

The spelling of 1100103021 in words is "one billion, one hundred million, one hundred three thousand, twenty-one".