1002021221105 has 16 divisors (see below), whose sum is σ = 1211710541184. Its totient is φ = 795428000640.

The previous prime is 1002021221101. The next prime is 1002021221111. The reversal of 1002021221105 is 5011221202001.

It is not a de Polignac number, because 1002021221105 - 2² = 1002021221101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002021221101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8181077 + ... + 8302653.

It is an arithmetic number, because the mean of its divisors is an integer number (75731908824).

Almost surely, 2^{1002021221105} is an apocalyptic number.

It is an amenable number.

1002021221105 is a deficient number, since it is larger than the sum of its proper divisors (209689320079).

1002021221105 is a wasteful number, since it uses less digits than its factorization.

1002021221105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134296.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 1002021221105 its reverse (5011221202001), we get a palindrome (6013242423106).

The spelling of 1002021221105 in words is "one trillion, two billion, twenty-one million, two hundred twenty-one thousand, one hundred five".