1021240353443 has 4 divisors (see below), whose sum is σ = 1021260178560. Its totient is φ = 1021220528328.

The previous prime is 1021240353437. The next prime is 1021240353451. The reversal of 1021240353443 is 3443530421201.

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 1021240353443 - 2¹⁴ = 1021240337059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021240353433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9835088 + ... + 9938381.

It is an arithmetic number, because the mean of its divisors is an integer number (255315044640).

Almost surely, 2^{1021240353443} is an apocalyptic number.

1021240353443 is a deficient number, since it is larger than the sum of its proper divisors (19825117).

1021240353443 is an equidigital number, since it uses as much as digits as its factorization.

1021240353443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825116.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1021240353443 its reverse (3443530421201), we get a palindrome (4464770774644).

The spelling of 1021240353443 in words is "one trillion, twenty-one billion, two hundred forty million, three hundred fifty-three thousand, four hundred forty-three".