2001001000122 has 48 divisors (see below), whose sum is σ = 4453828135848. Its totient is φ = 648888514560.

The previous prime is 2001001000121. The next prime is 2001001000133. The reversal of 2001001000122 is 2210001001002.

It can be written as a sum of positive squares in 4 ways, for example, as 1582289767881 + 418711232241 = 1257891^2 + 647079^2 .

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 (2001001000121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3579973 + ... + 4101000.

Almost surely, 2^{2001001000122} is an apocalyptic number.

2001001000122 is an abundant number, since it is smaller than the sum of its proper divisors (2452827135726).

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

2001001000122 is a wasteful number, since it uses less digits than its factorization.

2001001000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7681375 (or 7681372 counting only the distinct ones).

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

Adding to 2001001000122 its reverse (2210001001002), we get a palindrome (4211002001124).

The spelling of 2001001000122 in words is "two trillion, one billion, one million, one hundred twenty-two", and thus it is an aban number.