1021506131323 has 8 divisors (see below), whose sum is σ = 1056313862928. Its totient is φ = 987273734304.

The previous prime is 1021506131287. The next prime is 1021506131363. The reversal of 1021506131323 is 3231316051201.

It is a happy number.

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-1021506131323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021506131291 and 1021506131300.

It is not an unprimeable number, because it can be changed into a prime (1021506131363) 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 7 ways as a sum of consecutive naturals, for example, 143830036 + ... + 143837137.

It is an arithmetic number, because the mean of its divisors is an integer number (132039232866).

Almost surely, 2^{1021506131323} is an apocalyptic number.

1021506131323 is a deficient number, since it is larger than the sum of its proper divisors (34807731605).

1021506131323 is an equidigital number, since it uses as much as digits as its factorization.

1021506131323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287667293.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 1021506131323 in words is "one trillion, twenty-one billion, five hundred six million, one hundred thirty-one thousand, three hundred twenty-three".