20123311231211 has 8 divisors (see below), whose sum is σ = 20134941664320. Its totient is φ = 20111682382792.

The previous prime is 20123311231183. The next prime is 20123311231223. The reversal of 20123311231211 is 11213211332102.

It is a happy number.

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 20123311231211 - 2⁶ = 20123311231147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123311231291) 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, 25496060 + ... + 26273478.

It is an arithmetic number, because the mean of its divisors is an integer number (2516867708040).

Almost surely, 2^{20123311231211} is an apocalyptic number.

20123311231211 is a deficient number, since it is larger than the sum of its proper divisors (11630433109).

20123311231211 is a wasteful number, since it uses less digits than its factorization.

20123311231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792345.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20123311231211 its reverse (11213211332102), we get a palindrome (31336522563313).

The spelling of 20123311231211 in words is "twenty trillion, one hundred twenty-three billion, three hundred eleven million, two hundred thirty-one thousand, two hundred eleven".