21010201222 has 4 divisors (see below), whose sum is σ = 31515301836. Its totient is φ = 10505100610.

The previous prime is 21010201193. The next prime is 21010201229. The reversal of 21010201222 is 22210201012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010201229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252550304 + ... + 5252550307.

It is an arithmetic number, because the mean of its divisors is an integer number (7878825459).

Almost surely, 2^21010201222 is an apocalyptic number.

21010201222 is a deficient number, since it is larger than the sum of its proper divisors (10505100614).

21010201222 is a wasteful number, since it uses less digits than its factorization.

21010201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505100613.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010201222 its reverse (22210201012), we get a palindrome (43220402234).

The spelling of 21010201222 in words is "twenty-one billion, ten million, two hundred one thousand, two hundred twenty-two".