12111211121131 has 8 divisors (see below), whose sum is σ = 12121040121344. Its totient is φ = 12101383181160.

The previous prime is 12111211121123. The next prime is 12111211121143. The reversal of 12111211121131 is 13112111211121.

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 12111211121131 - 2³ = 12111211121123 is a prime.

It is a super-2 number, since 2×12111211121131² (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 = 12111211121099 and 12111211121108.

It is not an unprimeable number, because it can be changed into a prime (12111211121171) 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, 23448736 + ... + 23959666.

It is an arithmetic number, because the mean of its divisors is an integer number (1515130015168).

Almost surely, 2^{12111211121131} is an apocalyptic number.

12111211121131 is a deficient number, since it is larger than the sum of its proper divisors (9829000213).

12111211121131 is a wasteful number, since it uses less digits than its factorization.

12111211121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530121.

The product of its digits is 24, while the sum is 19.

Adding to 12111211121131 its reverse (13112111211121), we get a palindrome (25223322332252).

It can be divided in two parts, 12111211121 and 131, that multiplied together give a palindrome (1586568656851).

The spelling of 12111211121131 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, one hundred thirty-one".