1243213523435 has 16 divisors (see below), whose sum is σ = 1613630202240. Its totient is φ = 914056341120.

The previous prime is 1243213523413. The next prime is 1243213523467. The reversal of 1243213523435 is 5343253123421.

It is not a de Polignac number, because 1243213523435 - 2³⁰ = 1242139781611 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41745731 + ... + 41775500.

It is an arithmetic number, because the mean of its divisors is an integer number (100851887640).

Almost surely, 2^{1243213523435} is an apocalyptic number.

1243213523435 is a deficient number, since it is larger than the sum of its proper divisors (370416678805).

1243213523435 is a wasteful number, since it uses less digits than its factorization.

1243213523435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83521478.

The product of its digits is 259200, while the sum is 38.

Adding to 1243213523435 its reverse (5343253123421), we get a palindrome (6586466646856).

The spelling of 1243213523435 in words is "one trillion, two hundred forty-three billion, two hundred thirteen million, five hundred twenty-three thousand, four hundred thirty-five".