1211220322123 has 8 divisors (see below), whose sum is σ = 1396951355360. Its totient is φ = 1028664178560.

The previous prime is 1211220322099. The next prime is 1211220322139. The reversal of 1211220322123 is 3212230221121.

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 1211220322123 - 2⁹ = 1211220321611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211220322094 and 1211220322103.

It is not an unprimeable number, because it can be changed into a prime (1211220322153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793721598 + ... + 793723123.

It is an arithmetic number, because the mean of its divisors is an integer number (174618919420).

Almost surely, 2^{1211220322123} is an apocalyptic number.

1211220322123 is a deficient number, since it is larger than the sum of its proper divisors (185731033237).

1211220322123 is a wasteful number, since it uses less digits than its factorization.

1211220322123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587444837.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1211220322123 its reverse (3212230221121), we get a palindrome (4423450543244).

The spelling of 1211220322123 in words is "one trillion, two hundred eleven billion, two hundred twenty million, three hundred twenty-two thousand, one hundred twenty-three".