1211212103123 has 8 divisors (see below), whose sum is σ = 1343717588160. Its totient is φ = 1082439167080.

The previous prime is 1211212103119. The next prime is 1211212103149. The reversal of 1211212103123 is 3213012121121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211212103123 - 2² = 1211212103119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211212103095 and 1211212103104.

It is not an unprimeable number, because it can be changed into a prime (1211212103183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933136565 + ... + 933137862.

It is an arithmetic number, because the mean of its divisors is an integer number (167964698520).

Almost surely, 2^{1211212103123} is an apocalyptic number.

1211212103123 is a deficient number, since it is larger than the sum of its proper divisors (132505485037).

1211212103123 is a wasteful number, since it uses less digits than its factorization.

1211212103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866274497.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211212103123 its reverse (3213012121121), we get a palindrome (4424224224244).

The spelling of 1211212103123 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred three thousand, one hundred twenty-three".