1023431343021 has 24 divisors (see below), whose sum is σ = 1528658576640. Its totient is φ = 659117764800.

The previous prime is 1023431342933. The next prime is 1023431343023. The reversal of 1023431343021 is 1203431343201.

It is a happy number.

1023431343021 is a `hidden beast` number, since 1 + 0 + 2 + 343 + 13 + 4 + 302 + 1 = 666.

It is not a de Polignac number, because 1023431343021 - 2¹¹ = 1023431340973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023431343023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3064635 + ... + 3382136.

It is an arithmetic number, because the mean of its divisors is an integer number (63694107360).

Almost surely, 2^{1023431343021} is an apocalyptic number.

It is an amenable number.

1023431343021 is a deficient number, since it is larger than the sum of its proper divisors (505227233619).

1023431343021 is a wasteful number, since it uses less digits than its factorization.

1023431343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447377 (or 6447374 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1023431343021 its reverse (1203431343201), we get a palindrome (2226862686222).

The spelling of 1023431343021 in words is "one trillion, twenty-three billion, four hundred thirty-one million, three hundred forty-three thousand, twenty-one".