211220100213113 has 2 divisors, whose sum is σ = 211220100213114. Its totient is φ = 211220100213112.

The previous prime is 211220100213049. The next prime is 211220100213119. The reversal of 211220100213113 is 311312001022112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209853380224489 + 1366719988624 = 14486317^2 + 1169068^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220100213113 - 2⁶ = 211220100213049 is a prime.

It is a super-2 number, since 2×211220100213113² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211220100213119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610050106556 + 105610050106557.

It is an arithmetic number, because the mean of its divisors is an integer number (105610050106557).

Almost surely, 2^{211220100213113} is an apocalyptic number.

It is an amenable number.

211220100213113 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220100213113 is an equidigital number, since it uses as much as digits as its factorization.

211220100213113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 211220100213113 its reverse (311312001022112), we get a palindrome (522532101235225).

The spelling of 211220100213113 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred million, two hundred thirteen thousand, one hundred thirteen".