20001212012011 has 4 divisors (see below), whose sum is σ = 20013612021072. Its totient is φ = 19988812002952.

The previous prime is 20001212012009. The next prime is 20001212012053. The reversal of 20001212012011 is 11021021210002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001212012011 - 2¹ = 20001212012009 is a prime.

It is a super-2 number, since 2×20001212012011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001212011982 and 20001212012000.

It is not an unprimeable number, because it can be changed into a prime (20001212012611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6200002111 + ... + 6200005336.

It is an arithmetic number, because the mean of its divisors is an integer number (5003403005268).

Almost surely, 2^{20001212012011} is an apocalyptic number.

20001212012011 is a deficient number, since it is larger than the sum of its proper divisors (12400009061).

20001212012011 is a wasteful number, since it uses less digits than its factorization.

20001212012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12400009060.

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

Adding to 20001212012011 its reverse (11021021210002), we get a palindrome (31022233222013).

The spelling of 20001212012011 in words is "twenty trillion, one billion, two hundred twelve million, twelve thousand, eleven".