1020001000122 has 24 divisors (see below), whose sum is σ = 2380002334164. Its totient is φ = 313846461504.

The previous prime is 1020001000121. The next prime is 1020001000153. The reversal of 1020001000122 is 2210001000201.

It can be written as a sum of positive squares in 2 ways, for example, as 1015138866681 + 4862133441 = 1007541^2 + 69729^2 .

It is a super-3 number, since 3×1020001000122³ (a number of 37 digits) contains 333 as substring.

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 (1020001000121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2179489083 + ... + 2179489550.

Almost surely, 2^{1020001000122} is an apocalyptic number.

1020001000122 is an abundant number, since it is smaller than the sum of its proper divisors (1360001334042).

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

1020001000122 is a wasteful number, since it uses less digits than its factorization.

1020001000122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358978654 (or 4358978651 counting only the distinct ones).

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

Adding to 1020001000122 its reverse (2210001000201), we get a palindrome (3230002000323).

The spelling of 1020001000122 in words is "one trillion, twenty billion, one million, one hundred twenty-two", and thus it is an aban number.