1223210120111 has 12 divisors (see below), whose sum is σ = 1424015052768. Its totient is φ = 1047657385152.

The previous prime is 1223210120029. The next prime is 1223210120147. The reversal of 1223210120111 is 1110210123221.

It is a happy number.

It is not a de Polignac number, because 1223210120111 - 2¹⁴ = 1223210103727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223210120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223210122111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9559991 + ... + 9687096.

It is an arithmetic number, because the mean of its divisors is an integer number (118667921064).

Almost surely, 2^{1223210120111} is an apocalyptic number.

1223210120111 is a deficient number, since it is larger than the sum of its proper divisors (200804932657).

1223210120111 is a wasteful number, since it uses less digits than its factorization.

1223210120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19248398 (or 19248391 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1223210120111 its reverse (1110210123221), we get a palindrome (2333420243332).

The spelling of 1223210120111 in words is "one trillion, two hundred twenty-three billion, two hundred ten million, one hundred twenty thousand, one hundred eleven".