1211012123 has 8 divisors (see below), whose sum is σ = 1264936608. Its totient is φ = 1157193664.

The previous prime is 1211012113. The next prime is 1211012137. The reversal of 1211012123 is 3212101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211012123 - 2⁴ = 1211012107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211012098 and 1211012107.

It is not an unprimeable number, because it can be changed into a prime (1211012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2690 + ... + 49287.

It is an arithmetic number, because the mean of its divisors is an integer number (158117076).

Almost surely, 2^1211012123 is an apocalyptic number.

1211012123 is a deficient number, since it is larger than the sum of its proper divisors (53924485).

1211012123 is a wasteful number, since it uses less digits than its factorization.

1211012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53013.

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

The square root of 1211012123 is about 34799.5994660858. The cubic root of 1211012123 is about 1065.8992670579.

Adding to 1211012123 its reverse (3212101121), we get a palindrome (4423113244).

The spelling of 1211012123 in words is "one billion, two hundred eleven million, twelve thousand, one hundred twenty-three".