2121121113 has 4 divisors (see below), whose sum is σ = 2828161488. Its totient is φ = 1414080740.

The previous prime is 2121121063. The next prime is 2121121117. The reversal of 2121121113 is 3111211212.

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 2121121113 - 2⁶ = 2121121049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121121092 and 2121121101.

It is not an unprimeable number, because it can be changed into a prime (2121121117) 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, 353520183 + ... + 353520188.

It is an arithmetic number, because the mean of its divisors is an integer number (707040372).

Almost surely, 2^2121121113 is an apocalyptic number.

It is an amenable number.

2121121113 is a deficient number, since it is larger than the sum of its proper divisors (707040375).

2121121113 is an equidigital number, since it uses as much as digits as its factorization.

2121121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707040374.

The product of its digits is 24, while the sum is 15.

The square root of 2121121113 is about 46055.6306329639. The cubic root of 2121121113 is about 1284.8580670601.

Adding to 2121121113 its reverse (3111211212), we get a palindrome (5232332325).

Subtracting 2121121113 from its reverse (3111211212), we obtain a palindrome (990090099).

It can be divided in two parts, 21211 and 21113, that added together give a palindrome (42324).

The spelling of 2121121113 in words is "two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred thirteen".