1021203354203 has 4 divisors (see below), whose sum is σ = 1046110753128. Its totient is φ = 996295955280.

The previous prime is 1021203354077. The next prime is 1021203354209. The reversal of 1021203354203 is 3024533021201.

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 1021203354203 - 2¹² = 1021203350107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021203354209) 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, 12453699401 + ... + 12453699482.

It is an arithmetic number, because the mean of its divisors is an integer number (261527688282).

Almost surely, 2^{1021203354203} is an apocalyptic number.

1021203354203 is a deficient number, since it is larger than the sum of its proper divisors (24907398925).

1021203354203 is an equidigital number, since it uses as much as digits as its factorization.

1021203354203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24907398924.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1021203354203 its reverse (3024533021201), we get a palindrome (4045736375404).

The spelling of 1021203354203 in words is "one trillion, twenty-one billion, two hundred three million, three hundred fifty-four thousand, two hundred three".