211116249541 has 2 divisors, whose sum is σ = 211116249542. Its totient is φ = 211116249540.

The previous prime is 211116249529. The next prime is 211116249581. The reversal of 211116249541 is 145942611112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197006373316 + 14109876225 = 443854^2 + 118785^2 .

It is a cyclic number.

It is not a de Polignac number, because 211116249541 - 2¹⁹ = 211115725253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211116249541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211116249581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105558124770 + 105558124771.

It is an arithmetic number, because the mean of its divisors is an integer number (105558124771).

Almost surely, 2^211116249541 is an apocalyptic number.

It is an amenable number.

211116249541 is a deficient number, since it is larger than the sum of its proper divisors (1).

211116249541 is an equidigital number, since it uses as much as digits as its factorization.

211116249541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The spelling of 211116249541 in words is "two hundred eleven billion, one hundred sixteen million, two hundred forty-nine thousand, five hundred forty-one".