1021440122531 has 4 divisors (see below), whose sum is σ = 1075200129000. Its totient is φ = 967680116064.

The previous prime is 1021440122509. The next prime is 1021440122533. The reversal of 1021440122531 is 1352210441201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021440122531 - 2⁶ = 1021440122467 is a prime.

It is a super-2 number, since 2×1021440122531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021440122531.

It is not an unprimeable number, because it can be changed into a prime (1021440122533) 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 3 ways as a sum of consecutive naturals, for example, 26880003206 + ... + 26880003243.

It is an arithmetic number, because the mean of its divisors is an integer number (268800032250).

Almost surely, 2^{1021440122531} is an apocalyptic number.

1021440122531 is a deficient number, since it is larger than the sum of its proper divisors (53760006469).

1021440122531 is an equidigital number, since it uses as much as digits as its factorization.

1021440122531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53760006468.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1021440122531 its reverse (1352210441201), we get a palindrome (2373650563732).

The spelling of 1021440122531 in words is "one trillion, twenty-one billion, four hundred forty million, one hundred twenty-two thousand, five hundred thirty-one".