11121425477 has 4 divisors (see below), whose sum is σ = 11706763680. Its totient is φ = 10536087276.

The previous prime is 11121425473. The next prime is 11121425503. The reversal of 11121425477 is 77452412111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77452412111 = 3613 ⋅21437147.

It is a cyclic number.

It is not a de Polignac number, because 11121425477 - 2² = 11121425473 is a prime.

It is a super-2 number, since 2×11121425477² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121425473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292669073 + ... + 292669110.

It is an arithmetic number, because the mean of its divisors is an integer number (2926690920).

Almost surely, 2^11121425477 is an apocalyptic number.

It is an amenable number.

11121425477 is a deficient number, since it is larger than the sum of its proper divisors (585338203).

11121425477 is an equidigital number, since it uses as much as digits as its factorization.

11121425477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585338202.

The product of its digits is 15680, while the sum is 35.

Adding to 11121425477 its reverse (77452412111), we get a palindrome (88573837588).

The spelling of 11121425477 in words is "eleven billion, one hundred twenty-one million, four hundred twenty-five thousand, four hundred seventy-seven".