1423231204021 has 4 divisors (see below), whose sum is σ = 1552615858944. Its totient is φ = 1293846549100.

The previous prime is 1423231203997. The next prime is 1423231204033. The reversal of 1423231204021 is 1204021323241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1423231204021 - 2⁷ = 1423231203893 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 (1423231204061) 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, 64692327445 + ... + 64692327466.

It is an arithmetic number, because the mean of its divisors is an integer number (388153964736).

Almost surely, 2^{1423231204021} is an apocalyptic number.

1423231204021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1423231204021 is a deficient number, since it is larger than the sum of its proper divisors (129384654923).

1423231204021 is a wasteful number, since it uses less digits than its factorization.

1423231204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129384654922.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1423231204021 its reverse (1204021323241), we get a palindrome (2627252527262).

The spelling of 1423231204021 in words is "one trillion, four hundred twenty-three billion, two hundred thirty-one million, two hundred four thousand, twenty-one".