1100021203 has 2 divisors, whose sum is σ = 1100021204. Its totient is φ = 1100021202.

The previous prime is 1100021191. The next prime is 1100021233. The reversal of 1100021203 is 3021200011.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100021203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100021203.

It is not a weakly prime, because it can be changed into another prime (1100021233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010601 + 550010602.

It is an arithmetic number, because the mean of its divisors is an integer number (550010602).

Almost surely, 2^1100021203 is an apocalyptic number.

1100021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100021203 is an equidigital number, since it uses as much as digits as its factorization.

1100021203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1100021203 is about 33166.5675492656. The cubic root of 1100021203 is about 1032.2867479699.

Adding to 1100021203 its reverse (3021200011), we get a palindrome (4121221214).

The spelling of 1100021203 in words is "one billion, one hundred million, twenty-one thousand, two hundred three".