21213320222 has 32 divisors (see below), whose sum is σ = 35517657600. Its totient is φ = 9443288448.

The previous prime is 21213320221. The next prime is 21213320237. The reversal of 21213320222 is 22202331212.

It is a happy number.

It is a super-2 number, since 2×21213320222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21213320194 and 21213320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213320221) 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, 417179 + ... + 465257.

It is an arithmetic number, because the mean of its divisors is an integer number (1109926800).

Almost surely, 2^21213320222 is an apocalyptic number.

21213320222 is a deficient number, since it is larger than the sum of its proper divisors (14304337378).

21213320222 is a wasteful number, since it uses less digits than its factorization.

21213320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48800.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21213320222 its reverse (22202331212), we get a palindrome (43415651434).

The spelling of 21213320222 in words is "twenty-one billion, two hundred thirteen million, three hundred twenty thousand, two hundred twenty-two".