21001022210012 has 12 divisors (see below), whose sum is σ = 39578849549736. Its totient is φ = 9692779481520.

The previous prime is 21001022210011. The next prime is 21001022210027. The reversal of 21001022210012 is 21001222010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001022210011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201932905814 + ... + 201932905917.

It is an arithmetic number, because the mean of its divisors is an integer number (3298237462478).

Almost surely, 2^{21001022210012} is an apocalyptic number.

It is an amenable number.

21001022210012 is a deficient number, since it is larger than the sum of its proper divisors (18577827339724).

21001022210012 is a wasteful number, since it uses less digits than its factorization.

21001022210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403865811748 (or 403865811746 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001022210012 its reverse (21001222010012), we get a palindrome (42002244220024).

The spelling of 21001022210012 in words is "twenty-one trillion, one billion, twenty-two million, two hundred ten thousand, twelve".