2121331011971 has 2 divisors, whose sum is σ = 2121331011972. Its totient is φ = 2121331011970.

The previous prime is 2121331011959. The next prime is 2121331012037. The reversal of 2121331011971 is 1791101331212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121331011971 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121331011071) 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, 1060665505985 + 1060665505986.

It is an arithmetic number, because the mean of its divisors is an integer number (1060665505986).

Almost surely, 2^{2121331011971} is an apocalyptic number.

2121331011971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121331011971 is an equidigital number, since it uses as much as digits as its factorization.

2121331011971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

The spelling of 2121331011971 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-one million, eleven thousand, nine hundred seventy-one".