20121144111131 has 8 divisors (see below), whose sum is σ = 23484861212160. Its totient is φ = 16879743995688.

The previous prime is 20121144111121. The next prime is 20121144111169. The reversal of 20121144111131 is 13111144112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20121144111131 is a prime.

It is a super-2 number, since 2×20121144111131² (a number of 27 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 = 20121144111097 and 20121144111106.

It is not an unprimeable number, because it can be changed into a prime (20121144111121) 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, 30579246041 + ... + 30579246698.

It is an arithmetic number, because the mean of its divisors is an integer number (2935607651520).

Almost surely, 2^{20121144111131} is an apocalyptic number.

20121144111131 is a deficient number, since it is larger than the sum of its proper divisors (3363717101029).

20121144111131 is an equidigital number, since it uses as much as digits as its factorization.

20121144111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61158492793.

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 20121144111131 its reverse (13111144112102), we get a palindrome (33232288223233).

The spelling of 20121144111131 in words is "twenty trillion, one hundred twenty-one billion, one hundred forty-four million, one hundred eleven thousand, one hundred thirty-one".