21222020032213 has 48 divisors (see below), whose sum is σ = 29400018935616. Its totient is φ = 15055485500160.

The previous prime is 21222020032183. The next prime is 21222020032219. The reversal of 21222020032213 is 31223002022212.

It is not a de Polignac number, because 21222020032213 - 2²⁹ = 21221483161301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222020032219) 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, 20232931 + ... + 21255952.

It is an arithmetic number, because the mean of its divisors is an integer number (612500394492).

Almost surely, 2^{21222020032213} is an apocalyptic number.

It is an amenable number.

21222020032213 is a deficient number, since it is larger than the sum of its proper divisors (8177998903403).

21222020032213 is a wasteful number, since it uses less digits than its factorization.

21222020032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41488994 (or 41488987 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21222020032213 its reverse (31223002022212), we get a palindrome (52445022054425).

The spelling of 21222020032213 in words is "twenty-one trillion, two hundred twenty-two billion, twenty million, thirty-two thousand, two hundred thirteen".