11100031421 has 2 divisors, whose sum is σ = 11100031422. Its totient is φ = 11100031420.

The previous prime is 11100031417. The next prime is 11100031427. The reversal of 11100031421 is 12413000111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7781004100 + 3319027321 = 88210^2 + 57611^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100031421 - 2² = 11100031417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11100031396 and 11100031405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100031427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550015710 + 5550015711.

It is an arithmetic number, because the mean of its divisors is an integer number (5550015711).

Almost surely, 2^11100031421 is an apocalyptic number.

It is an amenable number.

11100031421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100031421 is an equidigital number, since it uses as much as digits as its factorization.

11100031421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11100031421 its reverse (12413000111), we get a palindrome (23513031532).

The spelling of 11100031421 in words is "eleven billion, one hundred million, thirty-one thousand, four hundred twenty-one".