1021112221194 has 96 divisors (see below), whose sum is σ = 2405284683984. Its totient is φ = 311200081920.

The previous prime is 1021112221189. The next prime is 1021112221223. The reversal of 1021112221194 is 4911222111201.

It can be written as a sum of positive squares in 8 ways, for example, as 52732233225 + 968379987969 = 229635^2 + 984063^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42215784 + ... + 42239964.

Almost surely, 2^{1021112221194} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021112221194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202642341992).

1021112221194 is an abundant number, since it is smaller than the sum of its proper divisors (1384172462790).

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

1021112221194 is a wasteful number, since it uses less digits than its factorization.

1021112221194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25912 (or 25909 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

Adding to 1021112221194 its reverse (4911222111201), we get a palindrome (5932334332395).

The spelling of 1021112221194 in words is "one trillion, twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred ninety-four".