21020222112213 has 16 divisors (see below), whose sum is σ = 29245696099200. Its totient is φ = 13404121836864.

The previous prime is 21020222112187. The next prime is 21020222112247. The reversal of 21020222112213 is 31221122202012.

It is not a de Polignac number, because 21020222112213 - 2⁵ = 21020222112181 is a prime.

It is a super-3 number, since 3×21020222112213³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21020222112213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020222112293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12567895 + ... + 14141867.

It is an arithmetic number, because the mean of its divisors is an integer number (1827856006200).

Almost surely, 2^{21020222112213} is an apocalyptic number.

21020222112213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21020222112213 is a deficient number, since it is larger than the sum of its proper divisors (8225473986987).

21020222112213 is a wasteful number, since it uses less digits than its factorization.

21020222112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767548.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21020222112213 its reverse (31221122202012), we get a palindrome (52241344314225).

The spelling of 21020222112213 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, one hundred twelve thousand, two hundred thirteen".