121211302113 has 24 divisors (see below), whose sum is σ = 195441486240. Its totient is φ = 71752988160.

The previous prime is 121211302111. The next prime is 121211302187. The reversal of 121211302113 is 311203112121.

It is not a de Polignac number, because 121211302113 - 2¹ = 121211302111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211302111) 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, 14232448 + ... + 14240961.

It is an arithmetic number, because the mean of its divisors is an integer number (8143395260).

Almost surely, 2^121211302113 is an apocalyptic number.

It is an amenable number.

121211302113 is a deficient number, since it is larger than the sum of its proper divisors (74230184127).

121211302113 is a wasteful number, since it uses less digits than its factorization.

121211302113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28473469 (or 28473466 counting only the distinct ones).

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

Adding to 121211302113 its reverse (311203112121), we get a palindrome (432414414234).

It can be divided in two parts, 121211 and 302113, that added together give a palindrome (423324).

The spelling of 121211302113 in words is "one hundred twenty-one billion, two hundred eleven million, three hundred two thousand, one hundred thirteen".