12601023111 has 12 divisors (see below), whose sum is σ = 18211047192. Its totient is φ = 8396265456.

The previous prime is 12601023091. The next prime is 12601023119. The reversal of 12601023111 is 11132010621.

It is not a de Polignac number, because 12601023111 - 2²⁵ = 12567468679 is a prime.

It is a super-2 number, since 2×12601023111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12601023119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349936 + ... + 384261.

It is an arithmetic number, because the mean of its divisors is an integer number (1517587266).

Almost surely, 2^12601023111 is an apocalyptic number.

12601023111 is a deficient number, since it is larger than the sum of its proper divisors (5610024081).

12601023111 is a wasteful number, since it uses less digits than its factorization.

12601023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736110 (or 736107 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 12601023111 its reverse (11132010621), we get a palindrome (23733033732).

The spelling of 12601023111 in words is "twelve billion, six hundred one million, twenty-three thousand, one hundred eleven".