420403211231023 has 2 divisors, whose sum is σ = 420403211231024. Its totient is φ = 420403211231022.

The previous prime is 420403211231021. The next prime is 420403211231051. The reversal of 420403211231023 is 320132112304024.

It is an a-pointer prime, because the next prime (420403211231051) can be obtained adding 420403211231023 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420403211231023 - 2¹ = 420403211231021 is a prime.

It is a super-2 number, since 2×420403211231023² (a number of 30 digits) contains 22 as substring.

Together with 420403211231021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 420403211230982 and 420403211231000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420403211231021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210201605615511 + 210201605615512.

It is an arithmetic number, because the mean of its divisors is an integer number (210201605615512).

Almost surely, 2^{420403211231023} is an apocalyptic number.

420403211231023 is a deficient number, since it is larger than the sum of its proper divisors (1).

420403211231023 is an equidigital number, since it uses as much as digits as its factorization.

420403211231023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 420403211231023 its reverse (320132112304024), we get a palindrome (740535323535047).

The spelling of 420403211231023 in words is "four hundred twenty trillion, four hundred three billion, two hundred eleven million, two hundred thirty-one thousand, twenty-three".