21222010005 has 48 divisors (see below), whose sum is σ = 41577842880. Its totient is φ = 9190879488.

The previous prime is 21222010003. The next prime is 21222010013. The reversal of 21222010005 is 50001022212.

It is not a de Polignac number, because 21222010005 - 2¹ = 21222010003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222010003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 745864 + ... + 773793.

It is an arithmetic number, because the mean of its divisors is an integer number (866205060).

Almost surely, 2^21222010005 is an apocalyptic number.

It is an amenable number.

21222010005 is a deficient number, since it is larger than the sum of its proper divisors (20355832875).

21222010005 is a wasteful number, since it uses less digits than its factorization.

21222010005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519698 (or 1519691 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 21222010005 its reverse (50001022212), we get a palindrome (71223032217).

The spelling of 21222010005 in words is "twenty-one billion, two hundred twenty-two million, ten thousand, five".