12111310421 has 16 divisors (see below), whose sum is σ = 13914001920. Its totient is φ = 10326839040.

The previous prime is 12111310411. The next prime is 12111310447. The reversal of 12111310421 is 12401311121.

It is a de Polignac number, because none of the positive numbers 2^k-12111310421 is a prime.

It is a super-2 number, since 2×12111310421² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12111310421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111310411) 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, 1865501 + ... + 1871981.

It is an arithmetic number, because the mean of its divisors is an integer number (869625120).

Almost surely, 2^12111310421 is an apocalyptic number.

It is an amenable number.

12111310421 is a deficient number, since it is larger than the sum of its proper divisors (1802691499).

12111310421 is a wasteful number, since it uses less digits than its factorization.

12111310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12111310421 its reverse (12401311121), we get a palindrome (24512621542).

The spelling of 12111310421 in words is "twelve billion, one hundred eleven million, three hundred ten thousand, four hundred twenty-one".