1022117555621 has 2 divisors, whose sum is σ = 1022117555622. Its totient is φ = 1022117555620.

The previous prime is 1022117555609. The next prime is 1022117555663. The reversal of 1022117555621 is 1265557112201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524653948900 + 497463606721 = 724330^2 + 705311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022117555621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022117555821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511058777810 + 511058777811.

It is an arithmetic number, because the mean of its divisors is an integer number (511058777811).

Almost surely, 2^{1022117555621} is an apocalyptic number.

It is an amenable number.

1022117555621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022117555621 is an equidigital number, since it uses as much as digits as its factorization.

1022117555621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 1022117555621 in words is "one trillion, twenty-two billion, one hundred seventeen million, five hundred fifty-five thousand, six hundred twenty-one".