10112221221012 has 18 divisors (see below), whose sum is σ = 25561448086538. Its totient is φ = 3370740406992.

The previous prime is 10112221221001. The next prime is 10112221221049. The reversal of 10112221221012 is 21012212221101.

It can be written as a sum of positive squares in only one way, i.e., 7808425454736 + 2303795766276 = 2794356^2 + 1517826^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140447516923 + ... + 140447516994.

Almost surely, 2^{10112221221012} is an apocalyptic number.

10112221221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10112221221012 is an abundant number, since it is smaller than the sum of its proper divisors (15449226865526).

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

10112221221012 is a wasteful number, since it uses less digits than its factorization.

10112221221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280895033927 (or 280895033922 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10112221221012 its reverse (21012212221101), we get a palindrome (31124433442113).

The spelling of 10112221221012 in words is "ten trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twelve".