1021116794851 has 2 divisors, whose sum is σ = 1021116794852. Its totient is φ = 1021116794850.

The previous prime is 1021116794849. The next prime is 1021116794941. The reversal of 1021116794851 is 1584976111201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021116794851 - 2¹ = 1021116794849 is a prime.

It is a super-3 number, since 3×1021116794851³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1021116794849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021116794251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510558397425 + 510558397426.

It is an arithmetic number, because the mean of its divisors is an integer number (510558397426).

Almost surely, 2^{1021116794851} is an apocalyptic number.

1021116794851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021116794851 is an equidigital number, since it uses as much as digits as its factorization.

1021116794851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 46.

The spelling of 1021116794851 in words is "one trillion, twenty-one billion, one hundred sixteen million, seven hundred ninety-four thousand, eight hundred fifty-one".