2001221122102 has 32 divisors (see below), whose sum is σ = 3103965993600. Its totient is φ = 967297863168.

The previous prime is 2001221122093. The next prime is 2001221122169. The reversal of 2001221122102 is 2012211221002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946924 + ... + 2213392.

It is an arithmetic number, because the mean of its divisors is an integer number (96998937300).

Almost surely, 2^{2001221122102} is an apocalyptic number.

2001221122102 is a deficient number, since it is larger than the sum of its proper divisors (1102744871498).

2001221122102 is a wasteful number, since it uses less digits than its factorization.

2001221122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266760.

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

Adding to 2001221122102 its reverse (2012211221002), we get a palindrome (4013432343104).

The spelling of 2001221122102 in words is "two trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred two".