91022012402513 has 2 divisors, whose sum is σ = 91022012402514. Its totient is φ = 91022012402512.

The previous prime is 91022012402443. The next prime is 91022012402557. The reversal of 91022012402513 is 31520421022019.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91018144557649 + 3867844864 = 9540343^2 + 62192^2 .

It is an emirp because it is prime and its reverse (31520421022019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91022012402513 - 2¹⁶ = 91022012336977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91022012402513.

It is not a weakly prime, because it can be changed into another prime (91022012402413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45511006201256 + 45511006201257.

It is an arithmetic number, because the mean of its divisors is an integer number (45511006201257).

Almost surely, 2^{91022012402513} is an apocalyptic number.

It is an amenable number.

91022012402513 is a deficient number, since it is larger than the sum of its proper divisors (1).

91022012402513 is an equidigital number, since it uses as much as digits as its factorization.

91022012402513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 91022012402513 in words is "ninety-one trillion, twenty-two billion, twelve million, four hundred two thousand, five hundred thirteen".