21220111210002 has 16 divisors (see below), whose sum is σ = 42440294893152. Its totient is φ = 7073358324480.

The previous prime is 21220111209971. The next prime is 21220111210019. The reversal of 21220111210002 is 20001211102212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251378 + ... + 6633714.

It is an arithmetic number, because the mean of its divisors is an integer number (2652518430822).

Almost surely, 2^{21220111210002} is an apocalyptic number.

21220111210002 is an abundant number, since it is smaller than the sum of its proper divisors (21220183683150).

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

21220111210002 is a wasteful number, since it uses less digits than its factorization.

21220111210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039433.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220111210002 its reverse (20001211102212), we get a palindrome (41221322312214).

The spelling of 21220111210002 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred ten thousand, two".