1211121021967 has 2 divisors, whose sum is σ = 1211121021968. Its totient is φ = 1211121021966.

The previous prime is 1211121021839. The next prime is 1211121022061. The reversal of 1211121021967 is 7691201211121.

It is a strong prime.

It is an emirp because it is prime and its reverse (7691201211121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211121021967 - 2⁷ = 1211121021839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211121051967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605560510983 + 605560510984.

It is an arithmetic number, because the mean of its divisors is an integer number (605560510984).

Almost surely, 2^{1211121021967} is an apocalyptic number.

1211121021967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211121021967 is an equidigital number, since it uses as much as digits as its factorization.

1211121021967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 34.

The spelling of 1211121021967 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, nine hundred sixty-seven".