21203213322222 has 24 divisors (see below), whose sum is σ = 46049938257960. Its totient is φ = 7050869662320.

The previous prime is 21203213322197. The next prime is 21203213322229. The reversal of 21203213322222 is 22222331230212.

21203213322222 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 321 + 332 + 2 + 2 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203213322229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1405668229 + ... + 1405683312.

It is an arithmetic number, because the mean of its divisors is an integer number (1918747427415).

Almost surely, 2^{21203213322222} is an apocalyptic number.

21203213322222 is an abundant number, since it is smaller than the sum of its proper divisors (24846724935738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203213322222 is a wasteful number, since it uses less digits than its factorization.

21203213322222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811351968 (or 2811351965 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21203213322222 its reverse (22222331230212), we get a palindrome (43425544552434).

The spelling of 21203213322222 in words is "twenty-one trillion, two hundred three billion, two hundred thirteen million, three hundred twenty-two thousand, two hundred twenty-two".