21001222302 has 16 divisors (see below), whose sum is σ = 42110424720. Its totient is φ = 6982410752.

The previous prime is 21001222301. The next prime is 21001222309. The reversal of 21001222302 is 20322210012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001222301) 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, 4496643 + ... + 4501310.

It is an arithmetic number, because the mean of its divisors is an integer number (2631901545).

Almost surely, 2^21001222302 is an apocalyptic number.

21001222302 is an abundant number, since it is smaller than the sum of its proper divisors (21109202418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21001222302 is a wasteful number, since it uses less digits than its factorization.

21001222302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998347.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21001222302 its reverse (20322210012), we get a palindrome (41323432314).

The spelling of 21001222302 in words is "twenty-one billion, one million, two hundred twenty-two thousand, three hundred two".