21221120100010 has 32 divisors (see below), whose sum is σ = 38500120202112. Its totient is φ = 8421567631680.

The previous prime is 21221120099981. The next prime is 21221120100013. The reversal of 21221120100010 is 1000102112212.

It is not an unprimeable number, because it can be changed into a prime (21221120100013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15194542 + ... + 16532281.

It is an arithmetic number, because the mean of its divisors is an integer number (1203128756316).

Almost surely, 2^{21221120100010} is an apocalyptic number.

21221120100010 is a deficient number, since it is larger than the sum of its proper divisors (17279000102102).

21221120100010 is a wasteful number, since it uses less digits than its factorization.

21221120100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31727358.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21221120100010 its reverse (1000102112212), we get a palindrome (22221222212222).

The spelling of 21221120100010 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred thousand, ten".