21022110020212 has 144 divisors (see below), whose sum is σ = 42811511541120. Its totient is φ = 8847581073408.

The previous prime is 21022110020209. The next prime is 21022110020213. The reversal of 21022110020212 is 21202001122012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022110020213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25985302464 + ... + 25985303272.

It is an arithmetic number, because the mean of its divisors is an integer number (297302163480).

Almost surely, 2^{21022110020212} is an apocalyptic number.

It is an amenable number.

21022110020212 is an abundant number, since it is smaller than the sum of its proper divisors (21789401520908).

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

21022110020212 is a wasteful number, since it uses less digits than its factorization.

21022110020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022110020212 its reverse (21202001122012), we get a palindrome (42224111142224).

The spelling of 21022110020212 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, twenty thousand, two hundred twelve".