11311021103 has 2 divisors, whose sum is σ = 11311021104. Its totient is φ = 11311021102.

The previous prime is 11311021093. The next prime is 11311021133. The reversal of 11311021103 is 30112011311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11311021103 - 2¹² = 11311017007 is a prime.

It is a super-2 number, since 2×11311021103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311021133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655510551 + 5655510552.

It is an arithmetic number, because the mean of its divisors is an integer number (5655510552).

Almost surely, 2^11311021103 is an apocalyptic number.

11311021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311021103 is an equidigital number, since it uses as much as digits as its factorization.

11311021103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11311021103 its reverse (30112011311), we get a palindrome (41423032414).

The spelling of 11311021103 in words is "eleven billion, three hundred eleven million, twenty-one thousand, one hundred three".