1211202011223 has 16 divisors (see below), whose sum is σ = 1794419293440. Its totient is φ = 807447332952.

The previous prime is 1211202011153. The next prime is 1211202011231. The reversal of 1211202011223 is 3221102021121.

1211202011223 is a `hidden beast` number, since 121 + 120 + 201 + 1 + 223 = 666.

It is not a de Polignac number, because 1211202011223 - 2²⁵ = 1211168456791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211202011196 and 1211202011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211202011293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538990 + ... + 1647092.

It is an arithmetic number, because the mean of its divisors is an integer number (112151205840).

Almost surely, 2^{1211202011223} is an apocalyptic number.

1211202011223 is a deficient number, since it is larger than the sum of its proper divisors (583217282217).

1211202011223 is a wasteful number, since it uses less digits than its factorization.

1211202011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148595 (or 1148589 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211202011223 its reverse (3221102021121), we get a palindrome (4432304032344).

The spelling of 1211202011223 in words is "one trillion, two hundred eleven billion, two hundred two million, eleven thousand, two hundred twenty-three".