8121370211 has 2 divisors, whose sum is σ = 8121370212. Its totient is φ = 8121370210.

The previous prime is 8121370207. The next prime is 8121370223. The reversal of 8121370211 is 1120731218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8121370211 - 2² = 8121370207 is a prime.

It is not a weakly prime, because it can be changed into another prime (8121370291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060685105 + 4060685106.

It is an arithmetic number, because the mean of its divisors is an integer number (4060685106).

Almost surely, 2^8121370211 is an apocalyptic number.

8121370211 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121370211 is an equidigital number, since it uses as much as digits as its factorization.

8121370211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 8121370211 is about 90118.6451906596. The cubic root of 8121370211 is about 2010.0634626795.

The spelling of 8121370211 in words is "eight billion, one hundred twenty-one million, three hundred seventy thousand, two hundred eleven".