1321024503231 has 32 divisors (see below), whose sum is σ = 1994300118720. Its totient is φ = 863935967232.

The previous prime is 1321024503221. The next prime is 1321024503269. The reversal of 1321024503231 is 1323054201231.

1321024503231 is a `hidden beast` number, since 1 + 32 + 102 + 4 + 503 + 23 + 1 = 666.

It is not a de Polignac number, because 1321024503231 - 2⁵ = 1321024503199 is a prime.

It is a super-2 number, since 2×1321024503231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1321024503195 and 1321024503204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321024503221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9917931 + ... + 10050243.

It is an arithmetic number, because the mean of its divisors is an integer number (62321878710).

Almost surely, 2^{1321024503231} is an apocalyptic number.

1321024503231 is a deficient number, since it is larger than the sum of its proper divisors (673275615489).

1321024503231 is a wasteful number, since it uses less digits than its factorization.

1321024503231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139352 (or 139346 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 1321024503231 its reverse (1323054201231), we get a palindrome (2644078704462).

The spelling of 1321024503231 in words is "one trillion, three hundred twenty-one billion, twenty-four million, five hundred three thousand, two hundred thirty-one".