211131061 has 2 divisors, whose sum is σ = 211131062. Its totient is φ = 211131060.

The previous prime is 211131029. The next prime is 211131077. The reversal of 211131061 is 160131112.

It is an a-pointer prime, because the next prime (211131077) can be obtained adding 211131061 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190026225 + 21104836 = 13785^2 + 4594^2 .

It is a cyclic number.

It is not a de Polignac number, because 211131061 - 2⁵ = 211131029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211131091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105565530 + 105565531.

It is an arithmetic number, because the mean of its divisors is an integer number (105565531).

Almost surely, 2^211131061 is an apocalyptic number.

It is an amenable number.

211131061 is a deficient number, since it is larger than the sum of its proper divisors (1).

211131061 is an equidigital number, since it uses as much as digits as its factorization.

211131061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 211131061 is about 14530.3496516773. The cubic root of 211131061 is about 595.4574181920.

Adding to 211131061 its reverse (160131112), we get a palindrome (371262173).

The spelling of 211131061 in words is "two hundred eleven million, one hundred thirty-one thousand, sixty-one".