6121100213 has 2 divisors, whose sum is σ = 6121100214. Its totient is φ = 6121100212.

The previous prime is 6121100203. The next prime is 6121100233. The reversal of 6121100213 is 3120011216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6074955364 + 46144849 = 77942^2 + 6793^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121100213 - 2⁴ = 6121100197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6121100191 and 6121100200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6121100203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060550106 + 3060550107.

It is an arithmetic number, because the mean of its divisors is an integer number (3060550107).

Almost surely, 2^6121100213 is an apocalyptic number.

It is an amenable number.

6121100213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121100213 is an equidigital number, since it uses as much as digits as its factorization.

6121100213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 6121100213 is about 78237.4604201849. The cubic root of 6121100213 is about 1829.2644592948.

Adding to 6121100213 its reverse (3120011216), we get a palindrome (9241111429).

The spelling of 6121100213 in words is "six billion, one hundred twenty-one million, one hundred thousand, two hundred thirteen".