1002100121111 has 4 divisors (see below), whose sum is σ = 1002509645472. Its totient is φ = 1001690596752.

The previous prime is 1002100121107. The next prime is 1002100121161. The reversal of 1002100121111 is 1111210012001.

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

It is a cyclic number.

It is not a de Polignac number, because 1002100121111 - 2² = 1002100121107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002100121092 and 1002100121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002100121101) 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, 204758510 + ... + 204763403.

It is an arithmetic number, because the mean of its divisors is an integer number (250627411368).

Almost surely, 2^{1002100121111} is an apocalyptic number.

1002100121111 is a deficient number, since it is larger than the sum of its proper divisors (409524361).

1002100121111 is an equidigital number, since it uses as much as digits as its factorization.

1002100121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409524360.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1002100121111 its reverse (1111210012001), we get a palindrome (2113310133112).

It can be divided in two parts, 1002100 and 121111, that added together give a palindrome (1123211).

The spelling of 1002100121111 in words is "one trillion, two billion, one hundred million, one hundred twenty-one thousand, one hundred eleven".