1021304445345 has 12 divisors (see below), whose sum is σ = 1770261038676. Its totient is φ = 544695704160.

The previous prime is 1021304445341. The next prime is 1021304445367. The reversal of 1021304445345 is 5435444031201.

1021304445345 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 304 + 4 + 4 + 5 + 345 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 461622407184 + 559682038161 = 679428^2 + 748119^2 .

It is not a de Polignac number, because 1021304445345 - 2² = 1021304445341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021304445341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11347827126 + ... + 11347827215.

It is an arithmetic number, because the mean of its divisors is an integer number (147521753223).

Almost surely, 2^{1021304445345} is an apocalyptic number.

1021304445345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021304445345 is a deficient number, since it is larger than the sum of its proper divisors (748956593331).

1021304445345 is a wasteful number, since it uses less digits than its factorization.

1021304445345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22695654352 (or 22695654349 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 1021304445345 its reverse (5435444031201), we get a palindrome (6456748476546).

The spelling of 1021304445345 in words is "one trillion, twenty-one billion, three hundred four million, four hundred forty-five thousand, three hundred forty-five".