21022100001210 has 256 divisors, whose sum is σ = 65145666797568. Its totient is φ = 4215070675200.

The previous prime is 21022100001191. The next prime is 21022100001239. The reversal of 21022100001210 is 1210000122012.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6344899 + ... + 9072041.

It is an arithmetic number, because the mean of its divisors is an integer number (254475260928).

Almost surely, 2^{21022100001210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022100001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32572833398784).

21022100001210 is an abundant number, since it is smaller than the sum of its proper divisors (44123566796358).

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

21022100001210 is a wasteful number, since it uses less digits than its factorization.

21022100001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727289.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21022100001210 its reverse (1210000122012), we get a palindrome (22232100123222).

The spelling of 21022100001210 in words is "twenty-one trillion, twenty-two billion, one hundred million, one thousand, two hundred ten".