21210201012222 has 24 divisors (see below), whose sum is σ = 47197474325976. Its totient is φ = 6878984111856.

The previous prime is 21210201012199. The next prime is 21210201012227. The reversal of 21210201012222 is 22221010201212.

It is a happy number.

21210201012222 is a `hidden beast` number, since 21 + 210 + 201 + 0 + 12 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21210201012195 and 21210201012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210201012227) 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, 15923573668 + ... + 15923574999.

It is an arithmetic number, because the mean of its divisors is an integer number (1966561430249).

Almost surely, 2^{21210201012222} is an apocalyptic number.

21210201012222 is an abundant number, since it is smaller than the sum of its proper divisors (25987273313754).

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

21210201012222 is a wasteful number, since it uses less digits than its factorization.

21210201012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31847148712 (or 31847148709 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21210201012222 its reverse (22221010201212), we get a palindrome (43431211213434).

The spelling of 21210201012222 in words is "twenty-one trillion, two hundred ten billion, two hundred one million, twelve thousand, two hundred twenty-two".