21112020002002 has 32 divisors (see below), whose sum is σ = 32482538247600. Its totient is φ = 10285184563200.

The previous prime is 21112020001973. The next prime is 21112020002033. The reversal of 21112020002002 is 20020002021112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1249657930161 + 19862362071841 = 1117881^2 + 4456721^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197867524 + ... + 197974192.

Almost surely, 2^{21112020002002} is an apocalyptic number.

21112020002002 is a deficient number, since it is larger than the sum of its proper divisors (11370518245598).

21112020002002 is a wasteful number, since it uses less digits than its factorization.

21112020002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109822.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21112020002002 its reverse (20020002021112), we get a palindrome (41132022023114).

The spelling of 21112020002002 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two thousand, two".