11031321421 has 4 divisors (see below), whose sum is σ = 11164228992. Its totient is φ = 10898413852.

The previous prime is 11031321409. The next prime is 11031321481. The reversal of 11031321421 is 12412313011.

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 11031321421 - 2⁷ = 11031321293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031321481) 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, 66453661 + ... + 66453826.

It is an arithmetic number, because the mean of its divisors is an integer number (2791057248).

Almost surely, 2^11031321421 is an apocalyptic number.

It is an amenable number.

11031321421 is a deficient number, since it is larger than the sum of its proper divisors (132907571).

11031321421 is an equidigital number, since it uses as much as digits as its factorization.

11031321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132907570.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11031321421 its reverse (12412313011), we get a palindrome (23443634432).

The spelling of 11031321421 in words is "eleven billion, thirty-one million, three hundred twenty-one thousand, four hundred twenty-one".