1001021022 has 48 divisors (see below), whose sum is σ = 2213855280. Its totient is φ = 326797056.

The previous prime is 1001020997. The next prime is 1001021057. The reversal of 1001021022 is 2201201001.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001020995 and 1001021013.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 309558 + ... + 312774.

It is an arithmetic number, because the mean of its divisors is an integer number (46121985).

Almost surely, 2^1001021022 is an apocalyptic number.

1001021022 is an abundant number, since it is smaller than the sum of its proper divisors (1212834258).

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

1001021022 is a wasteful number, since it uses less digits than its factorization.

1001021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577 (or 3574 counting only the distinct ones).

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

The square root of 1001021022 is about 31638.9162583044. The cubic root of 1001021022 is about 1000.3402249006.

Adding to 1001021022 its reverse (2201201001), we get a palindrome (3202222023).

It can be divided in two parts, 100102 and 1022, that added together give a square (101124 = 318²).

The spelling of 1001021022 in words is "one billion, one million, twenty-one thousand, twenty-two".