1022021001 has 24 divisors (see below), whose sum is σ = 1564280640. Its totient is φ = 641196000.

The previous prime is 1022020999. The next prime is 1022021009. The reversal of 1022021001 is 1001202201.

It is not a de Polignac number, because 1022021001 - 2¹ = 1022020999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 23 ways as a sum of consecutive naturals, for example, 6031 + ... + 45611.

It is an arithmetic number, because the mean of its divisors is an integer number (65178360).

Almost surely, 2^1022021001 is an apocalyptic number.

It is an amenable number.

1022021001 is a deficient number, since it is larger than the sum of its proper divisors (542259639).

1022021001 is a wasteful number, since it uses less digits than its factorization.

1022021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39757 (or 39754 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1022021001 is about 31969.0631861492. The cubic root of 1022021001 is about 1007.2871028130.

Adding to 1022021001 its reverse (1001202201), we get a palindrome (2023223202).

The spelling of 1022021001 in words is "one billion, twenty-two million, twenty-one thousand, one".