2001221102104 has 32 divisors (see below), whose sum is σ = 4288537094400. Its totient is φ = 857624954400.

The previous prime is 2001221102077. The next prime is 2001221102117. The reversal of 2001221102104 is 4012011221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330829 + ... + 2027779.

It is an arithmetic number, because the mean of its divisors is an integer number (134016784200).

Almost surely, 2^{2001221102104} is an apocalyptic number.

It is an amenable number.

2001221102104 is an abundant number, since it is smaller than the sum of its proper divisors (2287315992296).

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

2001221102104 is a wasteful number, since it uses less digits than its factorization.

2001221102104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718023 (or 1718019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001221102104 its reverse (4012011221002), we get a palindrome (6013232323106).

The spelling of 2001221102104 in words is "two trillion, one billion, two hundred twenty-one million, one hundred two thousand, one hundred four".