2121012112007 has 2 divisors, whose sum is σ = 2121012112008. Its totient is φ = 2121012112006.

The previous prime is 2121012112003. The next prime is 2121012112033. The reversal of 2121012112007 is 7002112101212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121012112007 - 2² = 2121012112003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121012112007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121012112003) 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, 1060506056003 + 1060506056004.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506056004).

Almost surely, 2^{2121012112007} is an apocalyptic number.

2121012112007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012112007 is an equidigital number, since it uses as much as digits as its factorization.

2121012112007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 2121012112007 its reverse (7002112101212), we get a palindrome (9123124213219).

The spelling of 2121012112007 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twelve thousand, seven".