2001021121102 has 4 divisors (see below), whose sum is σ = 3001531681656. Its totient is φ = 1000510560550.

The previous prime is 2001021121097. The next prime is 2001021121117. The reversal of 2001021121102 is 2011211201002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500255280274 + ... + 500255280277.

It is an arithmetic number, because the mean of its divisors is an integer number (750382920414).

Almost surely, 2^{2001021121102} is an apocalyptic number.

2001021121102 is a deficient number, since it is larger than the sum of its proper divisors (1000510560554).

2001021121102 is a wasteful number, since it uses less digits than its factorization.

2001021121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000510560553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001021121102 its reverse (2011211201002), we get a palindrome (4012232322104).

The spelling of 2001021121102 in words is "two trillion, one billion, twenty-one million, one hundred twenty-one thousand, one hundred two".