11402000021 has 4 divisors (see below), whose sum is σ = 11407278444. Its totient is φ = 11396721600.

The previous prime is 11402000017. The next prime is 11402000023. The reversal of 11402000021 is 12000020411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5741092900 + 5660907121 = 75770^2 + 75239^2 .

It is a cyclic number.

It is not a de Polignac number, because 11402000021 - 2² = 11402000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11401999966 and 11402000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11402000023) 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 3 ways as a sum of consecutive naturals, for example, 2635970 + ... + 2640291.

It is an arithmetic number, because the mean of its divisors is an integer number (2851819611).

Almost surely, 2^11402000021 is an apocalyptic number.

It is an amenable number.

11402000021 is a deficient number, since it is larger than the sum of its proper divisors (5278423).

11402000021 is an equidigital number, since it uses as much as digits as its factorization.

11402000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278422.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11402000021 its reverse (12000020411), we get a palindrome (23402020432).

The spelling of 11402000021 in words is "eleven billion, four hundred two million, twenty-one", and thus it is an aban number.