21222211331330 has 8 divisors (see below), whose sum is σ = 38199980396412. Its totient is φ = 8488884532528.

The previous prime is 21222211331323. The next prime is 21222211331401. The reversal of 21222211331330 is 3313311222212.

It can be written as a sum of positive squares in 2 ways, for example, as 18597302626681 + 2624908704649 = 4312459^2 + 1620157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21222211331330³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222211331330.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061110566557 + ... + 1061110566576.

Almost surely, 2^{21222211331330} is an apocalyptic number.

21222211331330 is a deficient number, since it is larger than the sum of its proper divisors (16977769065082).

21222211331330 is a wasteful number, since it uses less digits than its factorization.

21222211331330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122221133140.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21222211331330 its reverse (3313311222212), we get a palindrome (24535522553542).

The spelling of 21222211331330 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, three hundred thirty-one thousand, three hundred thirty".