21220222020212 has 24 divisors (see below), whose sum is σ = 37284378812352. Its totient is φ = 10567544720000.

The previous prime is 21220222020211. The next prime is 21220222020233. The reversal of 21220222020212 is 21202022202212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220222020211) 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, 38198513 + ... + 38750055.

It is an arithmetic number, because the mean of its divisors is an integer number (1553515783848).

Almost surely, 2^{21220222020212} is an apocalyptic number.

It is an amenable number.

21220222020212 is a deficient number, since it is larger than the sum of its proper divisors (16064156792140).

21220222020212 is a wasteful number, since it uses less digits than its factorization.

21220222020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590119 (or 590117 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21220222020212 its reverse (21202022202212), we get a palindrome (42422244222424).

The spelling of 21220222020212 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, twenty thousand, two hundred twelve".