21002222330012 has 72 divisors (see below), whose sum is σ = 46341813057120. Its totient is φ = 8152264771200.

The previous prime is 21002222329937. The next prime is 21002222330069. The reversal of 21002222330012 is 21003322220012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10610939 + ... + 12433682.

It is an arithmetic number, because the mean of its divisors is an integer number (643636292460).

Almost surely, 2^{21002222330012} is an apocalyptic number.

21002222330012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21002222330012 is an abundant number, since it is smaller than the sum of its proper divisors (25339590727108).

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

21002222330012 is a wasteful number, since it uses less digits than its factorization.

21002222330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044923 (or 23044910 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21002222330012 its reverse (21003322220012), we get a palindrome (42005544550024).

The spelling of 21002222330012 in words is "twenty-one trillion, two billion, two hundred twenty-two million, three hundred thirty thousand, twelve".