211231130087 has 2 divisors, whose sum is σ = 211231130088. Its totient is φ = 211231130086.

The previous prime is 211231130003. The next prime is 211231130107. The reversal of 211231130087 is 780031132112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211231130087 - 2¹⁰ = 211231129063 is a prime.

It is a super-2 number, since 2×211231130087² (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 (211231130587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615565043 + 105615565044.

It is an arithmetic number, because the mean of its divisors is an integer number (105615565044).

Almost surely, 2^211231130087 is an apocalyptic number.

211231130087 is a deficient number, since it is larger than the sum of its proper divisors (1).

211231130087 is an equidigital number, since it uses as much as digits as its factorization.

211231130087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

Adding to 211231130087 its reverse (780031132112), we get a palindrome (991262262199).

The spelling of 211231130087 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred thirty thousand, eighty-seven".