1020222144 has 84 divisors (see below), whose sum is σ = 2931092944. Its totient is φ = 339282432.

The previous prime is 1020222143. The next prime is 1020222169. The reversal of 1020222144 is 4412220201.

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

It is not an unprimeable number, because it can be changed into a prime (1020222143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278694 + ... + 282330.

Almost surely, 2^1020222144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020222144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465546472).

1020222144 is an abundant number, since it is smaller than the sum of its proper divisors (1910870800).

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

1020222144 is a wasteful number, since it uses less digits than its factorization.

1020222144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1020222144 is about 31940.9164552303. The cubic root of 1020222144 is about 1006.6957811168.

Adding to 1020222144 its reverse (4412220201), we get a palindrome (5432442345).

The spelling of 1020222144 in words is "one billion, twenty million, two hundred twenty-two thousand, one hundred forty-four".