1020112221204 has 36 divisors (see below), whose sum is σ = 2638584844896. Its totient is φ = 332129559888.

The previous prime is 1020112221179. The next prime is 1020112221209. The reversal of 1020112221204 is 4021222110201.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020112221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329492064 + ... + 329495159.

Almost surely, 2^{1020112221204} is an apocalyptic number.

It is an amenable number.

1020112221204 is an abundant number, since it is smaller than the sum of its proper divisors (1618472623692).

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

1020112221204 is a wasteful number, since it uses less digits than its factorization.

1020112221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658987276 (or 658987271 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1020112221204 its reverse (4021222110201), we get a palindrome (5041334331405).

The spelling of 1020112221204 in words is "one trillion, twenty billion, one hundred twelve million, two hundred twenty-one thousand, two hundred four".