1221001119967 has 2 divisors, whose sum is σ = 1221001119968. Its totient is φ = 1221001119966.

The previous prime is 1221001119917. The next prime is 1221001120007. The reversal of 1221001119967 is 7699111001221.

It is an a-pointer prime, because the next prime (1221001120007) can be obtained adding 1221001119967 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221001119967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221001119917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610500559983 + 610500559984.

It is an arithmetic number, because the mean of its divisors is an integer number (610500559984).

Almost surely, 2^{1221001119967} is an apocalyptic number.

1221001119967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221001119967 is an equidigital number, since it uses as much as digits as its factorization.

1221001119967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 1221001119967 in words is "one trillion, two hundred twenty-one billion, one million, one hundred nineteen thousand, nine hundred sixty-seven".