1019992418521 has 2 divisors, whose sum is σ = 1019992418522. Its totient is φ = 1019992418520.

The previous prime is 1019992418507. The next prime is 1019992418573. The reversal of 1019992418521 is 1258142999101.

It is an a-pointer prime, because the next prime (1019992418573) can be obtained adding 1019992418521 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902661507225 + 117330911296 = 950085^2 + 342536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1019992418521 - 2⁹ = 1019992418009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1019992412521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509996209260 + 509996209261.

It is an arithmetic number, because the mean of its divisors is an integer number (509996209261).

Almost surely, 2^{1019992418521} is an apocalyptic number.

It is an amenable number.

1019992418521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019992418521 is an equidigital number, since it uses as much as digits as its factorization.

1019992418521 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 52.

The spelling of 1019992418521 in words is "one trillion, nineteen billion, nine hundred ninety-two million, four hundred eighteen thousand, five hundred twenty-one".