12111331331097 has 6 divisors (see below), whose sum is σ = 17494145256042. Its totient is φ = 8074220887392.

The previous prime is 12111331330961. The next prime is 12111331331111. The reversal of 12111331331097 is 79013313311121.

It is a happy number.

12111331331097 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 331 + 3 + 310 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10717694416521 + 1393636914576 = 3273789^2 + 1180524^2 .

It is not a de Polignac number, because 12111331331097 - 2¹¹ = 12111331329049 is a prime.

It is a super-2 number, since 2×12111331331097² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12111331321097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672851740608 + ... + 672851740625.

It is an arithmetic number, because the mean of its divisors is an integer number (2915690876007).

Almost surely, 2^{12111331331097} is an apocalyptic number.

It is an amenable number.

12111331331097 is a deficient number, since it is larger than the sum of its proper divisors (5382813924945).

12111331331097 is a wasteful number, since it uses less digits than its factorization.

12111331331097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345703481239 (or 1345703481236 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The spelling of 12111331331097 in words is "twelve trillion, one hundred eleven billion, three hundred thirty-one million, three hundred thirty-one thousand, ninety-seven".