1021022220112 has 20 divisors (see below), whose sum is σ = 1989665415540. Its totient is φ = 507560177408.

The previous prime is 1021022220091. The next prime is 1021022220173. The reversal of 1021022220112 is 2110222201201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 978880699456 + 42141520656 = 989384^2 + 205284^2 .

It is a super-3 number, since 3×1021022220112³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184430437 + ... + 184435972.

It is an arithmetic number, because the mean of its divisors is an integer number (99483270777).

Almost surely, 2^{1021022220112} is an apocalyptic number.

It is an amenable number.

1021022220112 is a deficient number, since it is larger than the sum of its proper divisors (968643195428).

1021022220112 is a wasteful number, since it uses less digits than its factorization.

1021022220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368866590 (or 368866584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021022220112 its reverse (2110222201201), we get a palindrome (3131244421313).

The spelling of 1021022220112 in words is "one trillion, twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred twelve".