11431345356021 has 8 divisors (see below), whose sum is σ = 15242713883584. Its totient is φ = 7620436866240.

The previous prime is 11431345355981. The next prime is 11431345356043. The reversal of 11431345356021 is 12065354313411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11431345356021 - 2¹⁹ = 11431344831733 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 (11431345356071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114951460 + ... + 115050861.

It is an arithmetic number, because the mean of its divisors is an integer number (1905339235448).

Almost surely, 2^{11431345356021} is an apocalyptic number.

It is an amenable number.

11431345356021 is a deficient number, since it is larger than the sum of its proper divisors (3811368527563).

11431345356021 is a wasteful number, since it uses less digits than its factorization.

11431345356021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230018891.

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 11431345356021 its reverse (12065354313411), we get a palindrome (23496699669432).

The spelling of 11431345356021 in words is "eleven trillion, four hundred thirty-one billion, three hundred forty-five million, three hundred fifty-six thousand, twenty-one".