1023201243421 has 12 divisors (see below), whose sum is σ = 1190288768700. Its totient is φ = 877004392320.

The previous prime is 1023201243403. The next prime is 1023201243431. The reversal of 1023201243421 is 1243421023201.

It can be written as a sum of positive squares in 2 ways, for example, as 144997977796 + 878203265625 = 380786^2 + 937125^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1023201243421 is a prime.

It is a super-3 number, since 3×1023201243421³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023201243431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1532005 + ... + 2096053.

It is an arithmetic number, because the mean of its divisors is an integer number (99190730725).

Almost surely, 2^{1023201243421} is an apocalyptic number.

It is an amenable number.

1023201243421 is a deficient number, since it is larger than the sum of its proper divisors (167087525279).

1023201243421 is an equidigital number, since it uses as much as digits as its factorization.

1023201243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601084 (or 601077 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1023201243421 its reverse (1243421023201), we get a palindrome (2266622266622).

The spelling of 1023201243421 in words is "one trillion, twenty-three billion, two hundred one million, two hundred forty-three thousand, four hundred twenty-one".