22121443031 has 4 divisors (see below), whose sum is σ = 22660990464. Its totient is φ = 21581895600.

The previous prime is 22121443013. The next prime is 22121443037. The reversal of 22121443031 is 13034412122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13034412122 = 2 ⋅6517206061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121443031 is a prime.

It is a super-2 number, since 2×22121443031² (a number of 21 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 = 22121442988 and 22121443006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121443037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269773655 + ... + 269773736.

It is an arithmetic number, because the mean of its divisors is an integer number (5665247616).

Almost surely, 2^22121443031 is an apocalyptic number.

22121443031 is a deficient number, since it is larger than the sum of its proper divisors (539547433).

22121443031 is an equidigital number, since it uses as much as digits as its factorization.

22121443031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539547432.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 22121443031 its reverse (13034412122), we get a palindrome (35155855153).

The spelling of 22121443031 in words is "twenty-two billion, one hundred twenty-one million, four hundred forty-three thousand, thirty-one".