2121630246539 has 2 divisors, whose sum is σ = 2121630246540. Its totient is φ = 2121630246538.

The previous prime is 2121630246509. The next prime is 2121630246569. The reversal of 2121630246539 is 9356420361212.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2121630246509) and next prime (2121630246569).

It is a cyclic number.

It is not a de Polignac number, because 2121630246539 - 2⁸ = 2121630246283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121630246539.

It is not a weakly prime, because it can be changed into another prime (2121630246509) 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, 1060815123269 + 1060815123270.

It is an arithmetic number, because the mean of its divisors is an integer number (1060815123270).

Almost surely, 2^{2121630246539} is an apocalyptic number.

2121630246539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121630246539 is an equidigital number, since it uses as much as digits as its factorization.

2121630246539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 2121630246539 in words is "two trillion, one hundred twenty-one billion, six hundred thirty million, two hundred forty-six thousand, five hundred thirty-nine".