1022021021 has 8 divisors (see below), whose sum is σ = 1169165184. Its totient is φ = 875162160.

The previous prime is 1022021017. The next prime is 1022021071. The reversal of 1022021021 is 1201202201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1022021021 - 2² = 1022021017 is a prime.

It is a Duffinian number.

1022021021 is a modest number, since divided by 21021 gives 1022 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1022020993 and 1022021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022021071) 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 7 ways as a sum of consecutive naturals, for example, 63590 + ... + 78023.

It is an arithmetic number, because the mean of its divisors is an integer number (146145648).

Almost surely, 2^1022021021 is an apocalyptic number.

It is an amenable number.

1022021021 is a deficient number, since it is larger than the sum of its proper divisors (147144163).

1022021021 is a wasteful number, since it uses less digits than its factorization.

1022021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142651.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1022021021 is about 31969.0634989516. The cubic root of 1022021021 is about 1007.2871093836.

Adding to 1022021021 its reverse (1201202201), we get a palindrome (2223223222).

The spelling of 1022021021 in words is "one billion, twenty-two million, twenty-one thousand, twenty-one".