21210030120222 has 24 divisors (see below), whose sum is σ = 45961121040120. Its totient is φ = 7069078381680.

The previous prime is 21210030120221. The next prime is 21210030120263. The reversal of 21210030120222 is 22202103001212.

21210030120222 is a `hidden beast` number, since 2 + 121 + 0 + 0 + 301 + 20 + 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 = 21210030120195 and 21210030120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210030120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77497804 + ... + 77771007.

It is an arithmetic number, because the mean of its divisors is an integer number (1915046710005).

Almost surely, 2^{21210030120222} is an apocalyptic number.

21210030120222 is an abundant number, since it is smaller than the sum of its proper divisors (24751090919898).

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

21210030120222 is a wasteful number, since it uses less digits than its factorization.

21210030120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155276408 (or 155276405 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21210030120222 its reverse (22202103001212), we get a palindrome (43412133121434).

The spelling of 21210030120222 in words is "twenty-one trillion, two hundred ten billion, thirty million, one hundred twenty thousand, two hundred twenty-two".