21002222010012 has 12 divisors (see below), whose sum is σ = 49005184690056. Its totient is φ = 7000740670000.

The previous prime is 21002222009999. The next prime is 21002222010031. The reversal of 21002222010012 is 21001022220012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21002222009973 and 21002222010000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875092583739 + ... + 875092583762.

It is an arithmetic number, because the mean of its divisors is an integer number (4083765390838).

Almost surely, 2^{21002222010012} is an apocalyptic number.

It is an amenable number.

21002222010012 is an abundant number, since it is smaller than the sum of its proper divisors (28002962680044).

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

21002222010012 is a wasteful number, since it uses less digits than its factorization.

21002222010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750185167508 (or 1750185167506 counting only the distinct ones).

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

Adding to 21002222010012 its reverse (21001022220012), we get a palindrome (42003244230024).

The spelling of 21002222010012 in words is "twenty-one trillion, two billion, two hundred twenty-two million, ten thousand, twelve".