2121865993367 has 2 divisors, whose sum is σ = 2121865993368. Its totient is φ = 2121865993366.

The previous prime is 2121865993363. The next prime is 2121865993381. The reversal of 2121865993367 is 7633995681212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121865993367 - 2² = 2121865993363 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121865993363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060932996683 + 1060932996684.

It is an arithmetic number, because the mean of its divisors is an integer number (1060932996684).

Almost surely, 2^{2121865993367} is an apocalyptic number.

2121865993367 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121865993367 is an equidigital number, since it uses as much as digits as its factorization.

2121865993367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 62.

The spelling of 2121865993367 in words is "two trillion, one hundred twenty-one billion, eight hundred sixty-five million, nine hundred ninety-three thousand, three hundred sixty-seven".