1331100123 has 16 divisors (see below), whose sum is σ = 1824116736. Its totient is φ = 862777440.

The previous prime is 1331100097. The next prime is 1331100139. The reversal of 1331100123 is 3210011331.

It is not a de Polignac number, because 1331100123 - 2⁸ = 1331099867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331100163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180988 + ... + 188198.

It is an arithmetic number, because the mean of its divisors is an integer number (114007296).

Almost surely, 2^1331100123 is an apocalyptic number.

1331100123 is a deficient number, since it is larger than the sum of its proper divisors (493016613).

1331100123 is a wasteful number, since it uses less digits than its factorization.

1331100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1331100123 is about 36484.2448599392. The cubic root of 1331100123 is about 1100.0275814021.

Adding to 1331100123 its reverse (3210011331), we get a palindrome (4541111454).

The spelling of 1331100123 in words is "one billion, three hundred thirty-one million, one hundred thousand, one hundred twenty-three".