2001221101102 has 4 divisors (see below), whose sum is σ = 3001831651656. Its totient is φ = 1000610550550.

The previous prime is 2001221101097. The next prime is 2001221101147. The reversal of 2001221101102 is 2011011221002.

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

It is a super-2 number, since 2×2001221101102² (a number of 25 digits) contains 22 as substring.

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, 500305275274 + ... + 500305275277.

It is an arithmetic number, because the mean of its divisors is an integer number (750457912914).

Almost surely, 2^{2001221101102} is an apocalyptic number.

2001221101102 is a deficient number, since it is larger than the sum of its proper divisors (1000610550554).

2001221101102 is a wasteful number, since it uses less digits than its factorization.

2001221101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000610550553.

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

Adding to 2001221101102 its reverse (2011011221002), we get a palindrome (4012232322104).

The spelling of 2001221101102 in words is "two trillion, one billion, two hundred twenty-one million, one hundred one thousand, one hundred two".