11111223401 has 4 divisors (see below), whose sum is σ = 11191160400. Its totient is φ = 11031286404.

The previous prime is 11111223367. The next prime is 11111223407. The reversal of 11111223401 is 10432211111.

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.

It is a cyclic number.

It is not a de Polignac number, because 11111223401 - 2¹⁴ = 11111207017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111223401.

It is not an unprimeable number, because it can be changed into a prime (11111223407) 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, 39968291 + ... + 39968568.

It is an arithmetic number, because the mean of its divisors is an integer number (2797790100).

Almost surely, 2^11111223401 is an apocalyptic number.

It is an amenable number.

11111223401 is a deficient number, since it is larger than the sum of its proper divisors (79936999).

11111223401 is an equidigital number, since it uses as much as digits as its factorization.

11111223401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79936998.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11111223401 its reverse (10432211111), we get a palindrome (21543434512).

The spelling of 11111223401 in words is "eleven billion, one hundred eleven million, two hundred twenty-three thousand, four hundred one".