2113000212121 has 4 divisors (see below), whose sum is σ = 2113230973732. Its totient is φ = 2112769450512.

The previous prime is 2113000212109. The next prime is 2113000212173. The reversal of 2113000212121 is 1212120003112.

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 441826090000 + 1671174122121 = 664700^2 + 1292739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113000212121 - 2³⁵ = 2078640473753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113000212095 and 2113000212104.

It is not an unprimeable number, because it can be changed into a prime (2113009212121) 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, 115367070 + ... + 115385383.

It is an arithmetic number, because the mean of its divisors is an integer number (528307743433).

Almost surely, 2^{2113000212121} is an apocalyptic number.

It is an amenable number.

2113000212121 is a deficient number, since it is larger than the sum of its proper divisors (230761611).

2113000212121 is an equidigital number, since it uses as much as digits as its factorization.

2113000212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230761610.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2113000212121 its reverse (1212120003112), we get a palindrome (3325120215233).

The spelling of 2113000212121 in words is "two trillion, one hundred thirteen billion, two hundred twelve thousand, one hundred twenty-one".