1021121323023 has 4 divisors (see below), whose sum is σ = 1361495097368. Its totient is φ = 680747548680.

The previous prime is 1021121322997. The next prime is 1021121323031. The reversal of 1021121323023 is 3203231211201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1021121323023 - 2¹⁶ = 1021121257487 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 (1021121323093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170186887168 + ... + 170186887173.

It is an arithmetic number, because the mean of its divisors is an integer number (340373774342).

Almost surely, 2^{1021121323023} is an apocalyptic number.

1021121323023 is a deficient number, since it is larger than the sum of its proper divisors (340373774345).

1021121323023 is an equidigital number, since it uses as much as digits as its factorization.

1021121323023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340373774344.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1021121323023 its reverse (3203231211201), we get a palindrome (4224352534224).

The spelling of 1021121323023 in words is "one trillion, twenty-one billion, one hundred twenty-one million, three hundred twenty-three thousand, twenty-three".