121213200311 has 4 divisors (see below), whose sum is σ = 138529371792. Its totient is φ = 103897028832.

The previous prime is 121213200287. The next prime is 121213200313. The reversal of 121213200311 is 113002312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113002312121 = 43 ⋅2627960747.

It is a cyclic number.

It is not a de Polignac number, because 121213200311 - 2⁶ = 121213200247 is a prime.

It is a super-2 number, since 2×121213200311² (a number of 23 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 121213200311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213200313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658085730 + ... + 8658085743.

It is an arithmetic number, because the mean of its divisors is an integer number (34632342948).

Almost surely, 2^121213200311 is an apocalyptic number.

121213200311 is a deficient number, since it is larger than the sum of its proper divisors (17316171481).

121213200311 is an equidigital number, since it uses as much as digits as its factorization.

121213200311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17316171480.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121213200311 its reverse (113002312121), we get a palindrome (234215512432).

The spelling of 121213200311 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred thousand, three hundred eleven".