11402242021 has 2 divisors, whose sum is σ = 11402242022. Its totient is φ = 11402242020.

The previous prime is 11402242003. The next prime is 11402242051. The reversal of 11402242021 is 12024220411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10206050625 + 1196191396 = 101025^2 + 34586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11402242021 is a prime.

It is a super-2 number, since 2×11402242021² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11402242021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11402242051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5701121010 + 5701121011.

It is an arithmetic number, because the mean of its divisors is an integer number (5701121011).

Almost surely, 2^11402242021 is an apocalyptic number.

It is an amenable number.

11402242021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11402242021 is an equidigital number, since it uses as much as digits as its factorization.

11402242021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 11402242021 its reverse (12024220411), we get a palindrome (23426462432).

The spelling of 11402242021 in words is "eleven billion, four hundred two million, two hundred forty-two thousand, twenty-one".