1021000122 has 48 divisors (see below), whose sum is σ = 2270916648. Its totient is φ = 331330560.

The previous prime is 1021000121. The next prime is 1021000139. The reversal of 1021000122 is 2210001201.

It can be written as a sum of positive squares in 4 ways, for example, as 600299001 + 420701121 = 24501^2 + 20511^2 .

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 (1021000121) 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 23 ways as a sum of consecutive naturals, for example, 436468 + ... + 438800.

Almost surely, 2^1021000122 is an apocalyptic number.

1021000122 is an abundant number, since it is smaller than the sum of its proper divisors (1249916526).

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

1021000122 is a wasteful number, since it uses less digits than its factorization.

1021000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975 (or 2972 counting only the distinct ones).

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

The square root of 1021000122 is about 31953.0925263894. The cubic root of 1021000122 is about 1006.9516038917.

Adding to 1021000122 its reverse (2210001201), we get a palindrome (3231001323).

The spelling of 1021000122 in words is "one billion, twenty-one million, one hundred twenty-two", and thus it is an aban number.