2121220099967 has 2 divisors, whose sum is σ = 2121220099968. Its totient is φ = 2121220099966.

The previous prime is 2121220099951. The next prime is 2121220100017. The reversal of 2121220099967 is 7699900221212.

It is an a-pointer prime, because the next prime (2121220100017) can be obtained adding 2121220099967 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121220099967 - 2⁴ = 2121220099951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121220099937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060610049983 + 1060610049984.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610049984).

Almost surely, 2^{2121220099967} is an apocalyptic number.

2121220099967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121220099967 is an equidigital number, since it uses as much as digits as its factorization.

2121220099967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 2121220099967 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, ninety-nine thousand, nine hundred sixty-seven".