21002222101 has 8 divisors (see below), whose sum is σ = 24003453440. Its totient is φ = 18001219248.

The previous prime is 21002222099. The next prime is 21002222123. The reversal of 21002222101 is 10122220012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21002222101 - 2¹ = 21002222099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002222141) 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, 249835 + ... + 323143.

It is an arithmetic number, because the mean of its divisors is an integer number (3000431680).

Almost surely, 2^21002222101 is an apocalyptic number.

It is an amenable number.

21002222101 is a deficient number, since it is larger than the sum of its proper divisors (3001231339).

21002222101 is an equidigital number, since it uses as much as digits as its factorization.

21002222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114243.

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

Adding to 21002222101 its reverse (10122220012), we get a palindrome (31124442113).

The spelling of 21002222101 in words is "twenty-one billion, two million, two hundred twenty-two thousand, one hundred one".