111212411132421 has 24 divisors (see below), whose sum is σ = 163689597840600. Its totient is φ = 72734485963776.

The previous prime is 111212411132411. The next prime is 111212411132441. The reversal of 111212411132421 is 124231114212111.

111212411132421 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 1 + 2 + 411 + 1 + 3 + 242 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1142643413025 + 110069767719396 = 1068945^2 + 10491414^2 .

It is not a de Polignac number, because 111212411132421 - 2⁶ = 111212411132357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212411132411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8952816 + ... + 17394761.

It is an arithmetic number, because the mean of its divisors is an integer number (6820399910025).

Almost surely, 2^{111212411132421} is an apocalyptic number.

It is an amenable number.

111212411132421 is a deficient number, since it is larger than the sum of its proper divisors (52477186708179).

111212411132421 is a wasteful number, since it uses less digits than its factorization.

111212411132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26356485 (or 26356482 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

Adding to 111212411132421 its reverse (124231114212111), we get a palindrome (235443525344532).

The spelling of 111212411132421 in words is "one hundred eleven trillion, two hundred twelve billion, four hundred eleven million, one hundred thirty-two thousand, four hundred twenty-one".