12690021720111 has 16 divisors (see below), whose sum is σ = 17378915820000. Its totient is φ = 8230612860288.

The previous prime is 12690021720059. The next prime is 12690021720151. The reversal of 12690021720111 is 11102712009621.

It is not a de Polignac number, because 12690021720111 - 2²⁶ = 12689954611247 is a prime.

It is a super-2 number, since 2×12690021720111² (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 (12690021720151) 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 15 ways as a sum of consecutive naturals, for example, 4005436 + ... + 6436113.

It is an arithmetic number, because the mean of its divisors is an integer number (1086182238750).

Almost surely, 2^{12690021720111} is an apocalyptic number.

12690021720111 is a deficient number, since it is larger than the sum of its proper divisors (4688894099889).

12690021720111 is a wasteful number, since it uses less digits than its factorization.

12690021720111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10452538.

The product of its (nonzero) digits is 3024, while the sum is 33.

Adding to 12690021720111 its reverse (11102712009621), we get a palindrome (23792733729732).

The spelling of 12690021720111 in words is "twelve trillion, six hundred ninety billion, twenty-one million, seven hundred twenty thousand, one hundred eleven".