12121223193 has 48 divisors (see below), whose sum is σ = 18901546560. Its totient is φ = 7457522688.

The previous prime is 12121223189. The next prime is 12121223209. The reversal of 12121223193 is 39132212121.

It is not a de Polignac number, because 12121223193 - 2² = 12121223189 is a prime.

It is a super-2 number, since 2×12121223193² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12121223143) 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, 2324373 + ... + 2329581.

It is an arithmetic number, because the mean of its divisors is an integer number (393782220).

Almost surely, 2^12121223193 is an apocalyptic number.

It is an amenable number.

12121223193 is a deficient number, since it is larger than the sum of its proper divisors (6780323367).

12121223193 is a wasteful number, since it uses less digits than its factorization.

12121223193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5523 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The spelling of 12121223193 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred ninety-three".