21022222101 has 8 divisors (see below), whose sum is σ = 28030988160. Its totient is φ = 14014135392.

The previous prime is 21022222033. The next prime is 21022222129. The reversal of 21022222101 is 10122222012.

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

It is not a de Polignac number, because 21022222101 - 2¹¹ = 21022220053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022222171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92616 + ... + 224993.

It is an arithmetic number, because the mean of its divisors is an integer number (3503873520).

Almost surely, 2^21022222101 is an apocalyptic number.

It is an amenable number.

21022222101 is a deficient number, since it is larger than the sum of its proper divisors (7008766059).

21022222101 is a wasteful number, since it uses less digits than its factorization.

21022222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339675.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022222101 its reverse (10122222012), we get a palindrome (31144444113).

The spelling of 21022222101 in words is "twenty-one billion, twenty-two million, two hundred twenty-two thousand, one hundred one".