1002111110221 has 16 divisors (see below), whose sum is σ = 1084552672000. Its totient is φ = 920439505728.

The previous prime is 1002111110213. The next prime is 1002111110227. The reversal of 1002111110221 is 1220111112001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1002111110221 - 2³ = 1002111110213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002111110227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4958860 + ... + 5156986.

It is an arithmetic number, because the mean of its divisors is an integer number (67784542000).

Almost surely, 2^{1002111110221} is an apocalyptic number.

It is an amenable number.

1002111110221 is a deficient number, since it is larger than the sum of its proper divisors (82441561779).

1002111110221 is a wasteful number, since it uses less digits than its factorization.

1002111110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200068.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1002111110221 its reverse (1220111112001), we get a palindrome (2222222222222).

The spelling of 1002111110221 in words is "one trillion, two billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-one".