421523123304131 has 4 divisors (see below), whose sum is σ = 423363835633200. Its totient is φ = 419682410975064.

The previous prime is 421523123304077. The next prime is 421523123304139. The reversal of 421523123304131 is 131403321325124.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421523123304131 is a prime.

It is a super-2 number, since 2×421523123304131² (a number of 30 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 = 421523123304091 and 421523123304100.

It is not an unprimeable number, because it can be changed into a prime (421523123304139) 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, 920356164191 + ... + 920356164648.

It is an arithmetic number, because the mean of its divisors is an integer number (105840958908300).

Almost surely, 2^{421523123304131} is an apocalyptic number.

421523123304131 is a deficient number, since it is larger than the sum of its proper divisors (1840712329069).

421523123304131 is a wasteful number, since it uses less digits than its factorization.

421523123304131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840712329068.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 421523123304131 its reverse (131403321325124), we get a palindrome (552926444629255).

The spelling of 421523123304131 in words is "four hundred twenty-one trillion, five hundred twenty-three billion, one hundred twenty-three million, three hundred four thousand, one hundred thirty-one".