11101135421 has 4 divisors (see below), whose sum is σ = 11103650844. Its totient is φ = 11098620000.

The previous prime is 11101135399. The next prime is 11101135457. The reversal of 11101135421 is 12453110111.

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 10026016900 + 1075118521 = 100130^2 + 32789^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101135421 - 2²² = 11096941117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101135393 and 11101135402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101135471) 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, 1251080 + ... + 1259921.

It is an arithmetic number, because the mean of its divisors is an integer number (2775912711).

Almost surely, 2^11101135421 is an apocalyptic number.

It is an amenable number.

11101135421 is a deficient number, since it is larger than the sum of its proper divisors (2515423).

11101135421 is an equidigital number, since it uses as much as digits as its factorization.

11101135421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515422.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 11101135421 its reverse (12453110111), we get a palindrome (23554245532).

The spelling of 11101135421 in words is "eleven billion, one hundred one million, one hundred thirty-five thousand, four hundred twenty-one".