11402042421 has 32 divisors (see below), whose sum is σ = 19001465856. Its totient is φ = 5908320000.

The previous prime is 11402042371. The next prime is 11402042441. The reversal of 11402042421 is 12424020411.

It is not a de Polignac number, because 11402042421 - 2⁶ = 11402042357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11402042441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31086 + ... + 154176.

It is an arithmetic number, because the mean of its divisors is an integer number (593795808).

Almost surely, 2^11402042421 is an apocalyptic number.

11402042421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11402042421 is a deficient number, since it is larger than the sum of its proper divisors (7599423435).

11402042421 is a wasteful number, since it uses less digits than its factorization.

11402042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123513.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 11402042421 its reverse (12424020411), we get a palindrome (23826062832).

The spelling of 11402042421 in words is "eleven billion, four hundred two million, forty-two thousand, four hundred twenty-one".