21220202101010 has 64 divisors (see below), whose sum is σ = 42851135548800. Its totient is φ = 7500417830400.

The previous prime is 21220202101009. The next prime is 21220202101037. The reversal of 21220202101010 is 1010120202212.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 17791361 + ... + 18946580.

It is an arithmetic number, because the mean of its divisors is an integer number (669548992950).

Almost surely, 2^{21220202101010} is an apocalyptic number.

21220202101010 is an abundant number, since it is smaller than the sum of its proper divisors (21630933447790).

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

21220202101010 is a wasteful number, since it uses less digits than its factorization.

21220202101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36738107.

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

Adding to 21220202101010 its reverse (1010120202212), we get a palindrome (22230322303222).

The spelling of 21220202101010 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred one thousand, ten".