1021100103 has 24 divisors (see below), whose sum is σ = 1524323840. Its totient is φ = 657985680.

The previous prime is 1021100099. The next prime is 1021100141. The reversal of 1021100103 is 3010011201.

1021100103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021100103 - 2² = 1021100099 is a prime.

It is a super-2 number, since 2×1021100103² = 2085290840693221218, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311688 + ... + 314946.

Almost surely, 2^1021100103 is an apocalyptic number.

1021100103 is a deficient number, since it is larger than the sum of its proper divisors (503223737).

1021100103 is a wasteful number, since it uses less digits than its factorization.

1021100103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419 (or 4416 counting only the distinct ones).

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

The square root of 1021100103 is about 31954.6569845461. The cubic root of 1021100103 is about 1006.9844712539.

Adding to 1021100103 its reverse (3010011201), we get a palindrome (4031111304).

It can be divided in two parts, 1021 and 100103, that added together give a square (101124 = 318²).

The spelling of 1021100103 in words is "one billion, twenty-one million, one hundred thousand, one hundred three".