11031220401 has 4 divisors (see below), whose sum is σ = 14708293872. Its totient is φ = 7354146932.

The previous prime is 11031220397. The next prime is 11031220439. The reversal of 11031220401 is 10402213011.

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 11031220401 - 2² = 11031220397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11031220001) 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, 1838536731 + ... + 1838536736.

It is an arithmetic number, because the mean of its divisors is an integer number (3677073468).

Almost surely, 2^11031220401 is an apocalyptic number.

It is an amenable number.

11031220401 is a deficient number, since it is larger than the sum of its proper divisors (3677073471).

11031220401 is an equidigital number, since it uses as much as digits as its factorization.

11031220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677073470.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11031220401 its reverse (10402213011), we get a palindrome (21433433412).

The spelling of 11031220401 in words is "eleven billion, thirty-one million, two hundred twenty thousand, four hundred one".