121121200200111 has 16 divisors (see below), whose sum is σ = 167107378394880. Its totient is φ = 77983443236160.

The previous prime is 121121200200071. The next prime is 121121200200131. The reversal of 121121200200111 is 111002002121121.

It is a happy number.

It is not a de Polignac number, because 121121200200111 - 2¹⁵ = 121121200167343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121200200131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5274842635 + ... + 5274865596.

It is an arithmetic number, because the mean of its divisors is an integer number (10444211149680).

Almost surely, 2^{121121200200111} is an apocalyptic number.

121121200200111 is a deficient number, since it is larger than the sum of its proper divisors (45986178194769).

121121200200111 is a wasteful number, since it uses less digits than its factorization.

121121200200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10549708366.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121200200111 its reverse (111002002121121), we get a palindrome (232123202321232).

The spelling of 121121200200111 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred million, two hundred thousand, one hundred eleven".