2102121231113 has 4 divisors (see below), whose sum is σ = 2102701450368. Its totient is φ = 2101541011860.

The previous prime is 2102121231109. The next prime is 2102121231149. The reversal of 2102121231113 is 3111321212012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102121231113 - 2² = 2102121231109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102121231313) 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, 290104193 + ... + 290111438.

It is an arithmetic number, because the mean of its divisors is an integer number (525675362592).

Almost surely, 2^{2102121231113} is an apocalyptic number.

It is an amenable number.

2102121231113 is a deficient number, since it is larger than the sum of its proper divisors (580219255).

2102121231113 is an equidigital number, since it uses as much as digits as its factorization.

2102121231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580219254.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2102121231113 its reverse (3111321212012), we get a palindrome (5213442443125).

The spelling of 2102121231113 in words is "two trillion, one hundred two billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred thirteen".