21220110121010 has 16 divisors (see below), whose sum is σ = 38201219545536. Its totient is φ = 8486928197808.

The previous prime is 21220110120997. The next prime is 21220110121019. The reversal of 21220110121010 is 1012101102212.

It is not an unprimeable number, because it can be changed into a prime (21220110121019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139401452 + ... + 139553591.

It is an arithmetic number, because the mean of its divisors is an integer number (2387576221596).

Almost surely, 2^{21220110121010} is an apocalyptic number.

21220110121010 is a deficient number, since it is larger than the sum of its proper divisors (16981109424526).

21220110121010 is a wasteful number, since it uses less digits than its factorization.

21220110121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278962657.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21220110121010 its reverse (1012101102212), we get a palindrome (22232211223222).

The spelling of 21220110121010 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, one hundred twenty-one thousand, ten".