211131033077 has 2 divisors, whose sum is σ = 211131033078. Its totient is φ = 211131033076.

The previous prime is 211131033073. The next prime is 211131033119. The reversal of 211131033077 is 770330131112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194312574481 + 16818458596 = 440809^2 + 129686^2 .

It is a cyclic number.

It is not a de Polignac number, because 211131033077 - 2² = 211131033073 is a prime.

It is a super-2 number, since 2×211131033077² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211131033073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105565516538 + 105565516539.

It is an arithmetic number, because the mean of its divisors is an integer number (105565516539).

Almost surely, 2^211131033077 is an apocalyptic number.

It is an amenable number.

211131033077 is a deficient number, since it is larger than the sum of its proper divisors (1).

211131033077 is an equidigital number, since it uses as much as digits as its factorization.

211131033077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 29.

Adding to 211131033077 its reverse (770330131112), we get a palindrome (981461164189).

The spelling of 211131033077 in words is "two hundred eleven billion, one hundred thirty-one million, thirty-three thousand, seventy-seven".