1021011203323 has 4 divisors (see below), whose sum is σ = 1021035941968. Its totient is φ = 1020986464680.

The previous prime is 1021011203297. The next prime is 1021011203411. The reversal of 1021011203323 is 3233021101201.

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 1021011203323 - 2²¹ = 1021009106171 is a prime.

It is a super-2 number, since 2×1021011203323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021011203323.

It is not an unprimeable number, because it can be changed into a prime (1021011201323) 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, 12307311 + ... + 12389992.

It is an arithmetic number, because the mean of its divisors is an integer number (255258985492).

Almost surely, 2^{1021011203323} is an apocalyptic number.

1021011203323 is a deficient number, since it is larger than the sum of its proper divisors (24738645).

1021011203323 is an equidigital number, since it uses as much as digits as its factorization.

1021011203323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24738644.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1021011203323 its reverse (3233021101201), we get a palindrome (4254032304524).

The spelling of 1021011203323 in words is "one trillion, twenty-one billion, eleven million, two hundred three thousand, three hundred twenty-three".