1211021112163 has 2 divisors, whose sum is σ = 1211021112164. Its totient is φ = 1211021112162.

The previous prime is 1211021112143. The next prime is 1211021112229. The reversal of 1211021112163 is 3612111201121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211021112163 is a prime.

It is a super-3 number, since 3×1211021112163³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1211021112143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510556081 + 605510556082.

It is an arithmetic number, because the mean of its divisors is an integer number (605510556082).

Almost surely, 2^{1211021112163} is an apocalyptic number.

1211021112163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211021112163 is an equidigital number, since it uses as much as digits as its factorization.

1211021112163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 1211021112163 its reverse (3612111201121), we get a palindrome (4823132313284).

The spelling of 1211021112163 in words is "one trillion, two hundred eleven billion, twenty-one million, one hundred twelve thousand, one hundred sixty-three".