221012010112 has 32 divisors (see below), whose sum is σ = 451036334700. Its totient is φ = 107810734080.

The previous prime is 221012010101. The next prime is 221012010119. The reversal of 221012010112 is 211010210122.

It can be written as a sum of positive squares in 2 ways, for example, as 219495998016 + 1516012096 = 468504^2 + 38936^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×221012010112² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221012010092 and 221012010101.

It is not an unprimeable number, because it can be changed into a prime (221012010119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21051537 + ... + 21062032.

Almost surely, 2^221012010112 is an apocalyptic number.

It is an amenable number.

221012010112 is an abundant number, since it is smaller than the sum of its proper divisors (230024324588).

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

221012010112 is an equidigital number, since it uses as much as digits as its factorization.

221012010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42113624 (or 42113612 counting only the distinct ones).

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

Adding to 221012010112 its reverse (211010210122), we get a palindrome (432022220234).

The spelling of 221012010112 in words is "two hundred twenty-one billion, twelve million, ten thousand, one hundred twelve".