21210222110000 has 1600 divisors, whose sum is σ = 69401912279040. Its totient is φ = 6083151360000.

The previous prime is 21210222109991. The next prime is 21210222110003. The reversal of 21210222110000 is 1122201212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21210222110003) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 55379169809 + ... + 55379170191.

Almost surely, 2^{21210222110000} is an apocalyptic number.

21210222110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210222110000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34700956139520).

21210222110000 is an abundant number, since it is smaller than the sum of its proper divisors (48191690169040).

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

21210222110000 is a wasteful number, since it uses less digits than its factorization.

21210222110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210222110000 its reverse (1122201212), we get a palindrome (21211344311212).

The spelling of 21210222110000 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, one hundred ten thousand".