1022111442 has 72 divisors (see below), whose sum is σ = 2456334972. Its totient is φ = 306915840.

The previous prime is 1022111429. The next prime is 1022111443. The reversal of 1022111442 is 2441112201.

1022111442 is a `hidden beast` number, since 1 + 0 + 221 + 1 + 1 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 633982041 + 388129401 = 25179^2 + 19701^2 .

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 (1022111443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 244038 + ... + 248190.

Almost surely, 2^1022111442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022111442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228167486).

1022111442 is an abundant number, since it is smaller than the sum of its proper divisors (1434223530).

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

1022111442 is a wasteful number, since it uses less digits than its factorization.

1022111442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296 (or 4282 counting only the distinct ones).

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

The square root of 1022111442 is about 31970.4776629940. The cubic root of 1022111442 is about 1007.3168143244.

Adding to 1022111442 its reverse (2441112201), we get a palindrome (3463223643).

The spelling of 1022111442 in words is "one billion, twenty-two million, one hundred eleven thousand, four hundred forty-two".