421234123031 has 4 divisors (see below), whose sum is σ = 421235977200. Its totient is φ = 421232268864.

The previous prime is 421234122983. The next prime is 421234123043. The reversal of 421234123031 is 130321432124.

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-421234123031 is a prime.

It is a super-2 number, since 2×421234123031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421234123091) 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, 529466 + ... + 1059623.

It is an arithmetic number, because the mean of its divisors is an integer number (105308994300).

Almost surely, 2^421234123031 is an apocalyptic number.

421234123031 is a deficient number, since it is larger than the sum of its proper divisors (1854169).

421234123031 is a wasteful number, since it uses less digits than its factorization.

421234123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854168.

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

Adding to 421234123031 its reverse (130321432124), we get a palindrome (551555555155).

The spelling of 421234123031 in words is "four hundred twenty-one billion, two hundred thirty-four million, one hundred twenty-three thousand, thirty-one".