1423123112021 has 32 divisors (see below), whose sum is σ = 1570332438528. Its totient is φ = 1281729873600.

The previous prime is 1423123112017. The next prime is 1423123112027. The reversal of 1423123112021 is 1202113213241.

It is a cyclic number.

It is not a de Polignac number, because 1423123112021 - 2² = 1423123112017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423123112027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45622196 + ... + 45653378.

It is an arithmetic number, because the mean of its divisors is an integer number (49072888704).

Almost surely, 2^{1423123112021} is an apocalyptic number.

It is an amenable number.

1423123112021 is a deficient number, since it is larger than the sum of its proper divisors (147209326507).

1423123112021 is a wasteful number, since it uses less digits than its factorization.

1423123112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31761.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1423123112021 its reverse (1202113213241), we get a palindrome (2625236325262).

The spelling of 1423123112021 in words is "one trillion, four hundred twenty-three billion, one hundred twenty-three million, one hundred twelve thousand, twenty-one".