1211010102089 has 2 divisors, whose sum is σ = 1211010102090. Its totient is φ = 1211010102088.

The previous prime is 1211010102079. The next prime is 1211010102149. The reversal of 1211010102089 is 9802010101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923649778489 + 287360323600 = 961067^2 + 536060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211010102089 - 2¹² = 1211010097993 is a prime.

It is a super-2 number, since 2×1211010102089² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211010102079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605505051044 + 605505051045.

It is an arithmetic number, because the mean of its divisors is an integer number (605505051045).

Almost surely, 2^{1211010102089} is an apocalyptic number.

It is an amenable number.

1211010102089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211010102089 is an equidigital number, since it uses as much as digits as its factorization.

1211010102089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 1211010102089 in words is "one trillion, two hundred eleven billion, ten million, one hundred two thousand, eighty-nine".