21220001001210 has 64 divisors (see below), whose sum is σ = 55590638463360. Its totient is φ = 5141203994880.

The previous prime is 21220001001191. The next prime is 21220001001229. The reversal of 21220001001210 is 1210010002212.

It is an interprime number because it is at equal distance from previous prime (21220001001191) and next prime (21220001001229).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18432165 + ... + 19549544.

It is an arithmetic number, because the mean of its divisors is an integer number (868603725990).

Almost surely, 2^{21220001001210} is an apocalyptic number.

21220001001210 is an abundant number, since it is smaller than the sum of its proper divisors (34370637462150).

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

21220001001210 is a wasteful number, since it uses less digits than its factorization.

21220001001210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37983423.

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

Adding to 21220001001210 its reverse (1210010002212), we get a palindrome (22430011003422).

The spelling of 21220001001210 in words is "twenty-one trillion, two hundred twenty billion, one million, one thousand, two hundred ten".