1021218288445 has 8 divisors (see below), whose sum is σ = 1225701652536. Its totient is φ = 816814826496.

The previous prime is 1021218288367. The next prime is 1021218288499. The reversal of 1021218288445 is 5448828121201.

It can be written as a sum of positive squares in 4 ways, for example, as 13431187449 + 1007787100996 = 115893^2 + 1003886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021218288445 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021218288395 and 1021218288404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19947412 + ... + 19998541.

It is an arithmetic number, because the mean of its divisors is an integer number (153212706567).

Almost surely, 2^{1021218288445} is an apocalyptic number.

It is an amenable number.

1021218288445 is a deficient number, since it is larger than the sum of its proper divisors (204483364091).

1021218288445 is an equidigital number, since it uses as much as digits as its factorization.

1021218288445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39951071.

The product of its (nonzero) digits is 327680, while the sum is 46.

The spelling of 1021218288445 in words is "one trillion, twenty-one billion, two hundred eighteen million, two hundred eighty-eight thousand, four hundred forty-five".