421042331123 has 4 divisors (see below), whose sum is σ = 428178641880. Its totient is φ = 413906020368.

The previous prime is 421042331081. The next prime is 421042331147. The reversal of 421042331123 is 321133240124.

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 421042331123 - 2¹⁶ = 421042265587 is a prime.

It is a super-2 number, since 2×421042331123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421042331092 and 421042331101.

It is not an unprimeable number, because it can be changed into a prime (421042331323) 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, 3568155290 + ... + 3568155407.

It is an arithmetic number, because the mean of its divisors is an integer number (107044660470).

Almost surely, 2^421042331123 is an apocalyptic number.

421042331123 is a deficient number, since it is larger than the sum of its proper divisors (7136310757).

421042331123 is an equidigital number, since it uses as much as digits as its factorization.

421042331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136310756.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 421042331123 its reverse (321133240124), we get a palindrome (742175571247).

Subtracting from 421042331123 its reverse (321133240124), we obtain a palindrome (99909090999).

The spelling of 421042331123 in words is "four hundred twenty-one billion, forty-two million, three hundred thirty-one thousand, one hundred twenty-three".