21011100222202 has 8 divisors (see below), whose sum is σ = 31690775473812. Its totient is φ = 10447508397600.

The previous prime is 21011100222187. The next prime is 21011100222221. The reversal of 21011100222202 is 20222200111012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18931992890281 + 2079107331921 = 4351091^2 + 1441911^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29020856299 + ... + 29020857022.

Almost surely, 2^{21011100222202} is an apocalyptic number.

21011100222202 is a deficient number, since it is larger than the sum of its proper divisors (10679675251610).

21011100222202 is a wasteful number, since it uses less digits than its factorization.

21011100222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58041713504.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21011100222202 its reverse (20222200111012), we get a palindrome (41233300333214).

The spelling of 21011100222202 in words is "twenty-one trillion, eleven billion, one hundred million, two hundred twenty-two thousand, two hundred two".