2111100121213 has 4 divisors (see below), whose sum is σ = 2112817860540. Its totient is φ = 2109382381888.

The previous prime is 2111100121199. The next prime is 2111100121223. The reversal of 2111100121213 is 3121210011112.

It is a happy number.

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 1186960133529 + 924139987684 = 1089477^2 + 961322^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111100121213 - 2⁵ = 2111100121181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111100121223) 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, 858867820 + ... + 858870277.

It is an arithmetic number, because the mean of its divisors is an integer number (528204465135).

Almost surely, 2^{2111100121213} is an apocalyptic number.

It is an amenable number.

2111100121213 is a deficient number, since it is larger than the sum of its proper divisors (1717739327).

2111100121213 is a wasteful number, since it uses less digits than its factorization.

2111100121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717739326.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2111100121213 its reverse (3121210011112), we get a palindrome (5232310132325).

The spelling of 2111100121213 in words is "two trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, two hundred thirteen".