11420423111421 has 12 divisors (see below), whose sum is σ = 16561888499520. Its totient is φ = 7583282277000.

The previous prime is 11420423111411. The next prime is 11420423111423. The reversal of 11420423111421 is 12411132402411.

11420423111421 is a `hidden beast` number, since 1 + 1 + 4 + 2 + 0 + 4 + 231 + 1 + 1 + 421 = 666.

It is not a de Polignac number, because 11420423111421 - 2⁵ = 11420423111389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11420423111423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2527758501 + ... + 2527763018.

It is an arithmetic number, because the mean of its divisors is an integer number (1380157374960).

Almost surely, 2^{11420423111421} is an apocalyptic number.

It is an amenable number.

11420423111421 is a deficient number, since it is larger than the sum of its proper divisors (5141465388099).

11420423111421 is a wasteful number, since it uses less digits than its factorization.

11420423111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055521776 (or 5055521773 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 11420423111421 its reverse (12411132402411), we get a palindrome (23831555513832).

The spelling of 11420423111421 in words is "eleven trillion, four hundred twenty billion, four hundred twenty-three million, one hundred eleven thousand, four hundred twenty-one".