22120434021 has 48 divisors (see below), whose sum is σ = 35186514048. Its totient is φ = 12317760000.

The previous prime is 22120434019. The next prime is 22120434029. The reversal of 22120434021 is 12043402122.

It is not a de Polignac number, because 22120434021 - 2¹ = 22120434019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120434029) 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 47 ways as a sum of consecutive naturals, for example, 7369521 + ... + 7372521.

It is an arithmetic number, because the mean of its divisors is an integer number (733052376).

Almost surely, 2^22120434021 is an apocalyptic number.

22120434021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22120434021 is a deficient number, since it is larger than the sum of its proper divisors (13066080027).

22120434021 is a wasteful number, since it uses less digits than its factorization.

22120434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22120434021 its reverse (12043402122), we get a palindrome (34163836143).

The spelling of 22120434021 in words is "twenty-two billion, one hundred twenty million, four hundred thirty-four thousand, twenty-one".