212111087 has 2 divisors, whose sum is σ = 212111088. Its totient is φ = 212111086.

The previous prime is 212111071. The next prime is 212111099. The reversal of 212111087 is 780111212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212111087 - 2⁴ = 212111071 is a prime.

It is a super-2 number, since 2×212111087² = 89982226456643138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212111027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055543 + 106055544.

It is an arithmetic number, because the mean of its divisors is an integer number (106055544).

Almost surely, 2^212111087 is an apocalyptic number.

212111087 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111087 is an equidigital number, since it uses as much as digits as its factorization.

212111087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 212111087 is about 14564.0340222069. The cubic root of 212111087 is about 596.3773257026.

Adding to 212111087 its reverse (780111212), we get a palindrome (992222299).

The spelling of 212111087 in words is "two hundred twelve million, one hundred eleven thousand, eighty-seven".