1021213103 has 4 divisors (see below), whose sum is σ = 1081284480. Its totient is φ = 961141728.

The previous prime is 1021213091. The next prime is 1021213111. The reversal of 1021213103 is 3013121201.

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 1021213103 - 2¹⁰ = 1021212079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210103) 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, 30035663 + ... + 30035696.

It is an arithmetic number, because the mean of its divisors is an integer number (270321120).

Almost surely, 2^1021213103 is an apocalyptic number.

1021213103 is a deficient number, since it is larger than the sum of its proper divisors (60071377).

1021213103 is an equidigital number, since it uses as much as digits as its factorization.

1021213103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60071376.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1021213103 is about 31956.4250660176. The cubic root of 1021213103 is about 1007.0216158484.

Adding to 1021213103 its reverse (3013121201), we get a palindrome (4034334304).

The spelling of 1021213103 in words is "one billion, twenty-one million, two hundred thirteen thousand, one hundred three".