12111001212111 has 16 divisors (see below), whose sum is σ = 16176912331008. Its totient is φ = 8059546555200.

The previous prime is 12111001212109. The next prime is 12111001212133. The reversal of 12111001212111 is 11121210011121.

It is not a de Polignac number, because 12111001212111 - 2¹ = 12111001212109 is a prime.

It is a super-2 number, since 2×12111001212111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111001212161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48921435 + ... + 49168371.

It is an arithmetic number, because the mean of its divisors is an integer number (1011057020688).

Almost surely, 2^{12111001212111} is an apocalyptic number.

12111001212111 is a deficient number, since it is larger than the sum of its proper divisors (4065911118897).

12111001212111 is a wasteful number, since it uses less digits than its factorization.

12111001212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276142.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12111001212111 its reverse (11121210011121), we get a palindrome (23232211223232).

The spelling of 12111001212111 in words is "twelve trillion, one hundred eleven billion, one million, two hundred twelve thousand, one hundred eleven".