121121232213 has 32 divisors (see below), whose sum is σ = 174092451840. Its totient is φ = 74685093120.

The previous prime is 121121232187. The next prime is 121121232217. The reversal of 121121232213 is 312232121121.

It is not a de Polignac number, because 121121232213 - 2¹⁷ = 121121101141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121232213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121232217) 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 31 ways as a sum of consecutive naturals, for example, 2713645 + ... + 2757917.

It is an arithmetic number, because the mean of its divisors is an integer number (5440389120).

Almost surely, 2^121121232213 is an apocalyptic number.

It is an amenable number.

121121232213 is a deficient number, since it is larger than the sum of its proper divisors (52971219627).

121121232213 is a wasteful number, since it uses less digits than its factorization.

121121232213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45609.

The product of its digits is 288, while the sum is 21.

Adding to 121121232213 its reverse (312232121121), we get a palindrome (433353353334).

The spelling of 121121232213 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred thirteen".