211011021913 has 2 divisors, whose sum is σ = 211011021914. Its totient is φ = 211011021912.

The previous prime is 211011021887. The next prime is 211011021919. The reversal of 211011021913 is 319120110112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122732510224 + 88278511689 = 350332^2 + 297117^2 .

It is a cyclic number.

It is not a de Polignac number, because 211011021913 - 2¹³ = 211011013721 is a prime.

It is not a weakly prime, because it can be changed into another prime (211011021919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505510956 + 105505510957.

It is an arithmetic number, because the mean of its divisors is an integer number (105505510957).

Almost surely, 2^211011021913 is an apocalyptic number.

It is an amenable number.

211011021913 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011021913 is an equidigital number, since it uses as much as digits as its factorization.

211011021913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 211011021913 in words is "two hundred eleven billion, eleven million, twenty-one thousand, nine hundred thirteen".