20111000212120 has 32 divisors (see below), whose sum is σ = 45277699820400. Its totient is φ = 8039431312768.

The previous prime is 20111000212103. The next prime is 20111000212139. The reversal of 20111000212120 is 2121200011102.

It is a self number, because there is not a number n which added to its sum of digits gives 20111000212120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155208559 + ... + 155338078.

Almost surely, 2^{20111000212120} is an apocalyptic number.

20111000212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111000212120 is an abundant number, since it is smaller than the sum of its proper divisors (25166699608280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111000212120 is a wasteful number, since it uses less digits than its factorization.

20111000212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310548267 (or 310548263 counting only the distinct ones).

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

Adding to 20111000212120 its reverse (2121200011102), we get a palindrome (22232200223222).

The spelling of 20111000212120 in words is "twenty trillion, one hundred eleven billion, two hundred twelve thousand, one hundred twenty".