1021231110103 has 4 divisors (see below), whose sum is σ = 1021235338728. Its totient is φ = 1021226881480.

The previous prime is 1021231110079. The next prime is 1021231110223. The reversal of 1021231110103 is 3010111321201.

It is a happy number.

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 1021231110103 - 2⁵ = 1021231110071 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 (1021231120103) 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, 1728601 + ... + 2242882.

It is an arithmetic number, because the mean of its divisors is an integer number (255308834682).

Almost surely, 2^{1021231110103} is an apocalyptic number.

1021231110103 is a deficient number, since it is larger than the sum of its proper divisors (4228625).

1021231110103 is an equidigital number, since it uses as much as digits as its factorization.

1021231110103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228624.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1021231110103 its reverse (3010111321201), we get a palindrome (4031342431304).

The spelling of 1021231110103 in words is "one trillion, twenty-one billion, two hundred thirty-one million, one hundred ten thousand, one hundred three".