12121231223 has 8 divisors (see below), whose sum is σ = 12336910800. Its totient is φ = 11905892928.

The previous prime is 12121231211. The next prime is 12121231261. The reversal of 12121231223 is 32213212121.

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 12121231223 - 2⁴ = 12121231207 is a prime.

It is a super-2 number, since 2×12121231223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121231195 and 12121231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121231723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13118 + ... + 156251.

It is an arithmetic number, because the mean of its divisors is an integer number (1542113850).

Almost surely, 2^12121231223 is an apocalyptic number.

12121231223 is a deficient number, since it is larger than the sum of its proper divisors (215679577).

12121231223 is a wasteful number, since it uses less digits than its factorization.

12121231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170641.

The product of its digits is 288, while the sum is 20.

Adding to 12121231223 its reverse (32213212121), we get a palindrome (44334443344).

The spelling of 12121231223 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-three".