21221101210112 has 40 divisors (see below), whose sum is σ = 42654651865056. Its totient is φ = 10547014331392.

The previous prime is 21221101210061. The next prime is 21221101210117. The reversal of 21221101210112 is 21101210112212.

It is not an unprimeable number, because it can be changed into a prime (21221101210117) 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 3 ways as a sum of consecutive naturals, for example, 124008698 + ... + 124179705.

Almost surely, 2^{21221101210112} is an apocalyptic number.

It is an amenable number.

21221101210112 is an abundant number, since it is smaller than the sum of its proper divisors (21433550654944).

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

21221101210112 is an equidigital number, since it uses as much as digits as its factorization.

21221101210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248188588 (or 248188572 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21221101210112 its reverse (21101210112212), we get a palindrome (42322311322324).

It can be divided in two parts, 212 and 21101210112, that multiplied together give a palindrome (4473456543744).

The spelling of 21221101210112 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred one million, two hundred ten thousand, one hundred twelve".