1321100042434 has 16 divisors (see below), whose sum is σ = 2116786018968. Its totient is φ = 616192417792.

The previous prime is 1321100042419. The next prime is 1321100042467. The reversal of 1321100042434 is 4342400011231.

It can be written as a sum of positive squares in 4 ways, for example, as 1232621755225 + 88478287209 = 1110235^2 + 297453^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321100042399 and 1321100042408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171924847 + ... + 171932530.

Almost surely, 2^{1321100042434} is an apocalyptic number.

1321100042434 is a deficient number, since it is larger than the sum of its proper divisors (795685976534).

1321100042434 is a wasteful number, since it uses less digits than its factorization.

1321100042434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343857509.

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

Adding to 1321100042434 its reverse (4342400011231), we get a palindrome (5663500053665).

The spelling of 1321100042434 in words is "one trillion, three hundred twenty-one billion, one hundred million, forty-two thousand, four hundred thirty-four".