20111233121131 has 4 divisors (see below), whose sum is σ = 20141116083352. Its totient is φ = 20081350158912.

The previous prime is 20111233121059. The next prime is 20111233121141. The reversal of 20111233121131 is 13112133211102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20111233121131 - 2¹¹ = 20111233119083 is a prime.

It is a super-2 number, since 2×20111233121131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111233121141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14941480101 + ... + 14941481446.

It is an arithmetic number, because the mean of its divisors is an integer number (5035279020838).

Almost surely, 2^{20111233121131} is an apocalyptic number.

20111233121131 is a deficient number, since it is larger than the sum of its proper divisors (29882962221).

20111233121131 is an equidigital number, since it uses as much as digits as its factorization.

20111233121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882962220.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 20111233121131 its reverse (13112133211102), we get a palindrome (33223366332233).

The spelling of 20111233121131 in words is "twenty trillion, one hundred eleven billion, two hundred thirty-three million, one hundred twenty-one thousand, one hundred thirty-one".