2001002012122 has 8 divisors (see below), whose sum is σ = 3020620872276. Its totient is φ = 994128388032.

The previous prime is 2001002012099. The next prime is 2001002012129. The reversal of 2001002012122 is 2212102001002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1999144315921 + 1857696201 = 1413911^2 + 43101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2001002012129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3186308623 + ... + 3186309250.

Almost surely, 2^{2001002012122} is an apocalyptic number.

2001002012122 is a deficient number, since it is larger than the sum of its proper divisors (1019618860154).

2001002012122 is a wasteful number, since it uses less digits than its factorization.

2001002012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372618032.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001002012122 its reverse (2212102001002), we get a palindrome (4213104013124).

The spelling of 2001002012122 in words is "two trillion, one billion, two million, twelve thousand, one hundred twenty-two".