2121012120067 has 2 divisors, whose sum is σ = 2121012120068. Its totient is φ = 2121012120066.

The previous prime is 2121012119981. The next prime is 2121012120083. The reversal of 2121012120067 is 7600212101212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012120067 - 2²³ = 2121003731459 is a prime.

It is a super-3 number, since 3×2121012120067³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2121012120167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506060033 + 1060506060034.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506060034).

Almost surely, 2^{2121012120067} is an apocalyptic number.

2121012120067 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012120067 is an equidigital number, since it uses as much as digits as its factorization.

2121012120067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 2121012120067 its reverse (7600212101212), we get a palindrome (9721224221279).

The spelling of 2121012120067 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty thousand, sixty-seven".