1131312021423 has 64 divisors (see below), whose sum is σ = 1588789268352. Its totient is φ = 715325644800.

The previous prime is 1131312021383. The next prime is 1131312021457. The reversal of 1131312021423 is 3241202131311.

It is not a de Polignac number, because 1131312021423 - 2²¹ = 1131309924271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131312021393 and 1131312021402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131312021023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 701370565 + ... + 701372177.

It is an arithmetic number, because the mean of its divisors is an integer number (24824832318).

Almost surely, 2^{1131312021423} is an apocalyptic number.

1131312021423 is a deficient number, since it is larger than the sum of its proper divisors (457477246929).

1131312021423 is a wasteful number, since it uses less digits than its factorization.

1131312021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1131312021423 its reverse (3241202131311), we get a palindrome (4372514152734).

The spelling of 1131312021423 in words is "one trillion, one hundred thirty-one billion, three hundred twelve million, twenty-one thousand, four hundred twenty-three".