1243320233421 has 16 divisors (see below), whose sum is σ = 1913341465728. Its totient is φ = 703434360000.

The previous prime is 1243320233411. The next prime is 1243320233429.

It is a happy number.

1243320233421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1243320233421 - 2⁹ = 1243320232909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243320233429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293095530 + ... + 293099771.

It is an arithmetic number, because the mean of its divisors is an integer number (119583841608).

Almost surely, 2^{1243320233421} is an apocalyptic number.

It is an amenable number.

1243320233421 is a deficient number, since it is larger than the sum of its proper divisors (670021232307).

1243320233421 is a wasteful number, since it uses less digits than its factorization.

1243320233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586195412.

The product of its (nonzero) digits is 20736, while the sum is 30.

It can be divided in two parts, 1243320 and 233421, that added together give a palindrome (1476741).

The spelling of 1243320233421 in words is "one trillion, two hundred forty-three billion, three hundred twenty million, two hundred thirty-three thousand, four hundred twenty-one".