22143421220 has 12 divisors (see below), whose sum is σ = 46501184604. Its totient is φ = 8857368480.

The previous prime is 22143421217. The next prime is 22143421229. The reversal of 22143421220 is 2212434122.

It can be written as a sum of positive squares in 2 ways, for example, as 16235346724 + 5908074496 = 127418^2 + 76864^2 .

It is a super-2 number, since 2×22143421220² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22143421229) 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, 553585511 + ... + 553585550.

It is an arithmetic number, because the mean of its divisors is an integer number (3875098717).

Almost surely, 2^22143421220 is an apocalyptic number.

22143421220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22143421220 is an abundant number, since it is smaller than the sum of its proper divisors (24357763384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22143421220 is a wasteful number, since it uses less digits than its factorization.

22143421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107171070 (or 1107171068 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22143421220 its reverse (2212434122), we get a palindrome (24355855342).

The spelling of 22143421220 in words is "twenty-two billion, one hundred forty-three million, four hundred twenty-one thousand, two hundred twenty".