1231021103443 has 8 divisors (see below), whose sum is σ = 1273482967680. Its totient is φ = 1188560096640.

The previous prime is 1231021103441. The next prime is 1231021103461. The reversal of 1231021103443 is 3443011201321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231021103443 - 2¹ = 1231021103441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231021103441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4364971 + ... + 4638427.

It is an arithmetic number, because the mean of its divisors is an integer number (159185370960).

Almost surely, 2^{1231021103443} is an apocalyptic number.

1231021103443 is a deficient number, since it is larger than the sum of its proper divisors (42461864237).

1231021103443 is a wasteful number, since it uses less digits than its factorization.

1231021103443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428717.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1231021103443 its reverse (3443011201321), we get a palindrome (4674032304764).

The spelling of 1231021103443 in words is "one trillion, two hundred thirty-one billion, twenty-one million, one hundred three thousand, four hundred forty-three".