121244430213 has 6 divisors (see below), whose sum is σ = 175130843654. Its totient is φ = 80829620136.

The previous prime is 121244430211. The next prime is 121244430221. The reversal of 121244430213 is 312034442121.

121244430213 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 4 + 443 + 0 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 117598927329 + 3645502884 = 342927^2 + 60378^2 .

It is not a de Polignac number, because 121244430213 - 2¹ = 121244430211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244430211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6735801670 + ... + 6735801687.

Almost surely, 2^121244430213 is an apocalyptic number.

It is an amenable number.

121244430213 is a deficient number, since it is larger than the sum of its proper divisors (53886413441).

121244430213 is a wasteful number, since it uses less digits than its factorization.

121244430213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471603363 (or 13471603360 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 121244430213 its reverse (312034442121), we get a palindrome (433278872334).

The spelling of 121244430213 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred thirty thousand, two hundred thirteen".