11402434021 has 24 divisors (see below), whose sum is σ = 13228271424. Its totient is φ = 9745390080.

The previous prime is 11402434003. The next prime is 11402434039. The reversal of 11402434021 is 12043420411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11402434003) and next prime (11402434039).

It is not a de Polignac number, because 11402434021 - 2¹³ = 11402425829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11402433983 and 11402434001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11402434091) 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 23 ways as a sum of consecutive naturals, for example, 4554256 + ... + 4556758.

It is an arithmetic number, because the mean of its divisors is an integer number (551177976).

Almost surely, 2^11402434021 is an apocalyptic number.

11402434021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11402434021 is a deficient number, since it is larger than the sum of its proper divisors (1825837403).

11402434021 is a wasteful number, since it uses less digits than its factorization.

11402434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981 (or 3964 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 11402434021 its reverse (12043420411), we get a palindrome (23445854432).

The spelling of 11402434021 in words is "eleven billion, four hundred two million, four hundred thirty-four thousand, twenty-one".