1001221432423 has 16 divisors (see below), whose sum is σ = 1023151974624. Its totient is φ = 979519242240.

The previous prime is 1001221432411. The next prime is 1001221432427. The reversal of 1001221432423 is 3242341221001.

It is a cyclic number.

It is not a de Polignac number, because 1001221432423 - 2²¹ = 1001219335271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221432427) 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, 5716533 + ... + 5889073.

It is an arithmetic number, because the mean of its divisors is an integer number (63946998414).

Almost surely, 2^{1001221432423} is an apocalyptic number.

1001221432423 is a deficient number, since it is larger than the sum of its proper divisors (21930542201).

1001221432423 is a wasteful number, since it uses less digits than its factorization.

1001221432423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173202.

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

Adding to 1001221432423 its reverse (3242341221001), we get a palindrome (4243562653424).

The spelling of 1001221432423 in words is "one trillion, one billion, two hundred twenty-one million, four hundred thirty-two thousand, four hundred twenty-three".