1101211123 has 4 divisors (see below), whose sum is σ = 1126820728. Its totient is φ = 1075601520.

The previous prime is 1101211121. The next prime is 1101211127. The reversal of 1101211123 is 3211121011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101211123 - 2¹ = 1101211121 is a prime.

It is a super-2 number, since 2×1101211123² = 2425331874837842258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101211121) 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, 12804738 + ... + 12804823.

It is an arithmetic number, because the mean of its divisors is an integer number (281705182).

Almost surely, 2^1101211123 is an apocalyptic number.

1101211123 is a deficient number, since it is larger than the sum of its proper divisors (25609605).

1101211123 is an equidigital number, since it uses as much as digits as its factorization.

1101211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25609604.

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

The square root of 1101211123 is about 33184.5012468170. The cubic root of 1101211123 is about 1032.6588304963.

Adding to 1101211123 its reverse (3211121011), we get a palindrome (4312332134).

The spelling of 1101211123 in words is "one billion, one hundred one million, two hundred eleven thousand, one hundred twenty-three".