1121211103 has 4 divisors (see below), whose sum is σ = 1121290840. Its totient is φ = 1121131368.

The previous prime is 1121211101. The next prime is 1121211127. The reversal of 1121211103 is 3011121211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121211103 - 2¹ = 1121211101 is a prime.

It is a super-2 number, since 2×1121211103² = 2514228674980953218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121211101) 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, 12525 + ... + 48982.

It is an arithmetic number, because the mean of its divisors is an integer number (280322710).

Almost surely, 2^1121211103 is an apocalyptic number.

1121211103 is a deficient number, since it is larger than the sum of its proper divisors (79737).

1121211103 is an equidigital number, since it uses as much as digits as its factorization.

1121211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79736.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1121211103 is about 33484.4904844019. The cubic root of 1121211103 is about 1038.8730096452.

Adding to 1121211103 its reverse (3011121211), we get a palindrome (4132332314).

The spelling of 1121211103 in words is "one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred three".