2102132121 has 4 divisors (see below), whose sum is σ = 2802842832. Its totient is φ = 1401421412.

The previous prime is 2102132117. The next prime is 2102132143. The reversal of 2102132121 is 1212312012.

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 2102132121 - 2² = 2102132117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102132121.

It is not an unprimeable number, because it can be changed into a prime (2102132191) 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, 350355351 + ... + 350355356.

It is an arithmetic number, because the mean of its divisors is an integer number (700710708).

Almost surely, 2^2102132121 is an apocalyptic number.

It is an amenable number.

2102132121 is a deficient number, since it is larger than the sum of its proper divisors (700710711).

2102132121 is an equidigital number, since it uses as much as digits as its factorization.

2102132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700710710.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2102132121 is about 45849.0143950772. The cubic root of 2102132121 is about 1281.0124072436.

Adding to 2102132121 its reverse (1212312012), we get a palindrome (3314444133).

The spelling of 2102132121 in words is "two billion, one hundred two million, one hundred thirty-two thousand, one hundred twenty-one".