20121200002111 has 8 divisors (see below), whose sum is σ = 21834396715824. Its totient is φ = 18431633588160.

The previous prime is 20121200002103. The next prime is 20121200002117. The reversal of 20121200002111 is 11120000212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121200002111 - 2³ = 20121200002103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121200002091 and 20121200002100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200002117) 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 7 ways as a sum of consecutive naturals, for example, 5907573166 + ... + 5907576571.

It is an arithmetic number, because the mean of its divisors is an integer number (2729299589478).

Almost surely, 2^{20121200002111} is an apocalyptic number.

20121200002111 is a deficient number, since it is larger than the sum of its proper divisors (1713196713713).

20121200002111 is a wasteful number, since it uses less digits than its factorization.

20121200002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11815149881.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121200002111 its reverse (11120000212102), we get a palindrome (31241200214213).

The spelling of 20121200002111 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, two thousand, one hundred eleven".