21100222202 has 8 divisors (see below), whose sum is σ = 32169191412. Its totient is φ = 10377158400.

The previous prime is 21100222189. The next prime is 21100222207. The reversal of 21100222202 is 20222200112.

It can be written as a sum of positive squares in 2 ways, for example, as 20817006961 + 283215241 = 144281^2 + 16829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21100222207) 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, 86476199 + ... + 86476442.

Almost surely, 2^21100222202 is an apocalyptic number.

21100222202 is a deficient number, since it is larger than the sum of its proper divisors (11068969210).

21100222202 is a wasteful number, since it uses less digits than its factorization.

21100222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172952704.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21100222202 its reverse (20222200112), we get a palindrome (41322422314).

The spelling of 21100222202 in words is "twenty-one billion, one hundred million, two hundred twenty-two thousand, two hundred two".