2001100121002 has 4 divisors (see below), whose sum is σ = 3001650181506. Its totient is φ = 1000550060500.

The previous prime is 2001100120997. The next prime is 2001100121003. The reversal of 2001100121002 is 2001210011002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1980467958681 + 20632162321 = 1407291^2 + 143639^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2001100121002.

It is not an unprimeable number, because it can be changed into a prime (2001100121003) 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 as a sum of consecutive naturals, namely, 500275030249 + ... + 500275030252.

Almost surely, 2^{2001100121002} is an apocalyptic number.

2001100121002 is a deficient number, since it is larger than the sum of its proper divisors (1000550060504).

2001100121002 is a wasteful number, since it uses less digits than its factorization.

2001100121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000550060503.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001100121002 its reverse (2001210011002), we get a palindrome (4002310132004).

The spelling of 2001100121002 in words is "two trillion, one billion, one hundred million, one hundred twenty-one thousand, two".