21002222235 has 16 divisors (see below), whose sum is σ = 33949986336. Its totient is φ = 11085708288.

The previous prime is 21002222233. The next prime is 21002222249. The reversal of 21002222235 is 53222220012.

It is not a de Polignac number, because 21002222235 - 2¹ = 21002222233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002222233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7215804 + ... + 7218713.

It is an arithmetic number, because the mean of its divisors is an integer number (2121874146).

Almost surely, 2^21002222235 is an apocalyptic number.

21002222235 is a deficient number, since it is larger than the sum of its proper divisors (12947764101).

21002222235 is a wasteful number, since it uses less digits than its factorization.

21002222235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14434622.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21002222235 its reverse (53222220012), we get a palindrome (74224442247).

The spelling of 21002222235 in words is "twenty-one billion, two million, two hundred twenty-two thousand, two hundred thirty-five".