1210121111223 has 48 divisors (see below), whose sum is σ = 1823138284032. Its totient is φ = 772757496000.

The previous prime is 1210121111201. The next prime is 1210121111237. The reversal of 1210121111223 is 3221111210121.

It is a happy number.

1210121111223 is a `hidden beast` number, since 1 + 210 + 121 + 111 + 223 = 666.

It is not a de Polignac number, because 1210121111223 - 2⁸ = 1210121110967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210121111196 and 1210121111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121111293) 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, 16300278 + ... + 16374348.

It is an arithmetic number, because the mean of its divisors is an integer number (37982047584).

Almost surely, 2^{1210121111223} is an apocalyptic number.

1210121111223 is a deficient number, since it is larger than the sum of its proper divisors (613017172809).

1210121111223 is a wasteful number, since it uses less digits than its factorization.

1210121111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74876 (or 74873 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1210121111223 its reverse (3221111210121), we get a palindrome (4431232321344).

The spelling of 1210121111223 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-three".