21220122120010 has 64 divisors (see below), whose sum is σ = 42103817013888. Its totient is φ = 7635895200000.

The previous prime is 21220122119993. The next prime is 21220122120013. The reversal of 21220122120010 is 1002122102212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21220122120013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20162545 + ... + 21188875.

It is an arithmetic number, because the mean of its divisors is an integer number (657872140842).

Almost surely, 2^{21220122120010} is an apocalyptic number.

21220122120010 is a deficient number, since it is larger than the sum of its proper divisors (20883694893878).

21220122120010 is a wasteful number, since it uses less digits than its factorization.

21220122120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028311.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220122120010 its reverse (1002122102212), we get a palindrome (22222244222222).

The spelling of 21220122120010 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred twenty thousand, ten".