11144020421 has 16 divisors (see below), whose sum is σ = 12496374144. Its totient is φ = 9882706944.

The previous prime is 11144020411. The next prime is 11144020463. The reversal of 11144020421 is 12402044111.

It is a cyclic number.

It is not a de Polignac number, because 11144020421 - 2⁶ = 11144020357 is a prime.

It is a super-2 number, since 2×11144020421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11144020393 and 11144020402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11144020411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186500 + ... + 238893.

It is an arithmetic number, because the mean of its divisors is an integer number (781023384).

Almost surely, 2^11144020421 is an apocalyptic number.

It is an amenable number.

11144020421 is a deficient number, since it is larger than the sum of its proper divisors (1352353723).

11144020421 is a wasteful number, since it uses less digits than its factorization.

11144020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425500.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11144020421 its reverse (12402044111), we get a palindrome (23546064532).

The spelling of 11144020421 in words is "eleven billion, one hundred forty-four million, twenty thousand, four hundred twenty-one".