21220101110112 has 192 divisors, whose sum is σ = 61301314045440. Its totient is φ = 6397423718400.

The previous prime is 21220101110101. The next prime is 21220101110203. The reversal of 21220101110112 is 21101110102212.

It is a happy number.

It is a super-2 number, since 2×21220101110112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220101110091 and 21220101110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21371562 + ... + 22342422.

It is an arithmetic number, because the mean of its divisors is an integer number (319277677320).

Almost surely, 2^{21220101110112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220101110112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30650657022720).

21220101110112 is an abundant number, since it is smaller than the sum of its proper divisors (40081212935328).

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

21220101110112 is a wasteful number, since it uses less digits than its factorization.

21220101110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971437 (or 971429 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21220101110112 its reverse (21101110102212), we get a palindrome (42321211212324).

The spelling of 21220101110112 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred ten thousand, one hundred twelve".