1021440432145 has 24 divisors (see below), whose sum is σ = 1425892118400. Its totient is φ = 700394359392.

The previous prime is 1021440432139. The next prime is 1021440432157. The reversal of 1021440432145 is 5412340441201.

It is a happy number.

It is not a de Polignac number, because 1021440432145 - 2¹¹ = 1021440430097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13589176 + ... + 13664134.

It is an arithmetic number, because the mean of its divisors is an integer number (59412171600).

Almost surely, 2^{1021440432145} is an apocalyptic number.

It is an amenable number.

1021440432145 is a deficient number, since it is larger than the sum of its proper divisors (404451686255).

1021440432145 is an equidigital number, since it uses as much as digits as its factorization.

1021440432145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130597 (or 130590 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 1021440432145 its reverse (5412340441201), we get a palindrome (6433780873346).

The spelling of 1021440432145 in words is "one trillion, twenty-one billion, four hundred forty million, four hundred thirty-two thousand, one hundred forty-five".