1021498140991 has 2 divisors, whose sum is σ = 1021498140992. Its totient is φ = 1021498140990.

The previous prime is 1021498140907. The next prime is 1021498141009. The reversal of 1021498140991 is 1990418941201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021498140991 - 2²³ = 1021489752383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021498110991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510749070495 + 510749070496.

It is an arithmetic number, because the mean of its divisors is an integer number (510749070496).

Almost surely, 2^{1021498140991} is an apocalyptic number.

1021498140991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021498140991 is an equidigital number, since it uses as much as digits as its factorization.

1021498140991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 1021498140991 in words is "one trillion, twenty-one billion, four hundred ninety-eight million, one hundred forty thousand, nine hundred ninety-one".