23421221031 has 16 divisors (see below), whose sum is σ = 33781293056. Its totient is φ = 14348421216.

The previous prime is 23421220993. The next prime is 23421221051. The reversal of 23421221031 is 13012212432.

It is not a de Polignac number, because 23421221031 - 2¹⁰ = 23421220007 is a prime.

It is a super-2 number, since 2×23421221031² (a number of 22 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 = 23421220989 and 23421221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421221051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337815 + ... + 1355208.

It is an arithmetic number, because the mean of its divisors is an integer number (2111330816).

Almost surely, 2^23421221031 is an apocalyptic number.

23421221031 is a deficient number, since it is larger than the sum of its proper divisors (10360072025).

23421221031 is a wasteful number, since it uses less digits than its factorization.

23421221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693262.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 23421221031 its reverse (13012212432), we get a palindrome (36433433463).

The spelling of 23421221031 in words is "twenty-three billion, four hundred twenty-one million, two hundred twenty-one thousand, thirty-one".