21100002020212 has 24 divisors (see below), whose sum is σ = 37710898807680. Its totient is φ = 10325462562240.

The previous prime is 21100002020203. The next prime is 21100002020213. The reversal of 21100002020212 is 21202020000112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21100002020192 and 21100002020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100002020213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36966912 + ... + 37533352.

It is an arithmetic number, because the mean of its divisors is an integer number (1571287450320).

Almost surely, 2^{21100002020212} is an apocalyptic number.

It is an amenable number.

21100002020212 is a deficient number, since it is larger than the sum of its proper divisors (16610896787468).

21100002020212 is a wasteful number, since it uses less digits than its factorization.

21100002020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764631 (or 764629 counting only the distinct ones).

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

Adding to 21100002020212 its reverse (21202020000112), we get a palindrome (42302022020324).

The spelling of 21100002020212 in words is "twenty-one trillion, one hundred billion, two million, twenty thousand, two hundred twelve".