1002102111121 has 4 divisors (see below), whose sum is σ = 1018530014644. Its totient is φ = 985674207600.

The previous prime is 1002102111091. The next prime is 1002102111173. The reversal of 1002102111121 is 1211112012001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 240041203600 + 762060907521 = 489940^2 + 872961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002102111121 - 2⁵ = 1002102111089 is a prime.

It is a super-2 number, since 2×1002102111121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002102111421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8213951670 + ... + 8213951791.

It is an arithmetic number, because the mean of its divisors is an integer number (254632503661).

Almost surely, 2^{1002102111121} is an apocalyptic number.

It is an amenable number.

1002102111121 is a deficient number, since it is larger than the sum of its proper divisors (16427903523).

1002102111121 is an equidigital number, since it uses as much as digits as its factorization.

1002102111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16427903522.

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

Adding to 1002102111121 its reverse (1211112012001), we get a palindrome (2213214123122).

The spelling of 1002102111121 in words is "one trillion, two billion, one hundred two million, one hundred eleven thousand, one hundred twenty-one".