1022021004 has 24 divisors (see below), whose sum is σ = 2388794688. Its totient is φ = 340090960.

The previous prime is 1022020999. The next prime is 1022021009. The reversal of 1022021004 is 4001202201.

It is an interprime number because it is at equal distance from previous prime (1022020999) and next prime (1022021009).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1022021009) 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 7 ways as a sum of consecutive naturals, for example, 65502 + ... + 79589.

It is an arithmetic number, because the mean of its divisors is an integer number (99533112).

Almost surely, 2^1022021004 is an apocalyptic number.

It is an amenable number.

1022021004 is an abundant number, since it is smaller than the sum of its proper divisors (1366773684).

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

1022021004 is a wasteful number, since it uses less digits than its factorization.

1022021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145685 (or 145683 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1022021004 is about 31969.0632330696. The cubic root of 1022021004 is about 1007.2871037986.

Adding to 1022021004 its reverse (4001202201), we get a palindrome (5023223205).

The spelling of 1022021004 in words is "one billion, twenty-two million, twenty-one thousand, four".