1211301102123 has 48 divisors (see below), whose sum is σ = 2011613123520. Its totient is φ = 688022995968.

The previous prime is 1211301102103. The next prime is 1211301102157. The reversal of 1211301102123 is 3212011031121.

It is not a de Polignac number, because 1211301102123 - 2⁶ = 1211301102059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211301102096 and 1211301102105.

It is not an unprimeable number, because it can be changed into a prime (1211301102103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13570383 + ... + 13659351.

It is an arithmetic number, because the mean of its divisors is an integer number (41908606740).

Almost surely, 2^{1211301102123} is an apocalyptic number.

1211301102123 is a deficient number, since it is larger than the sum of its proper divisors (800312021397).

1211301102123 is a wasteful number, since it uses less digits than its factorization.

1211301102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90276 (or 90273 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211301102123 its reverse (3212011031121), we get a palindrome (4423312133244).

The spelling of 1211301102123 in words is "one trillion, two hundred eleven billion, three hundred one million, one hundred two thousand, one hundred twenty-three".