20111212120102 has 4 divisors (see below), whose sum is σ = 30166818180156. Its totient is φ = 10055606060050.

The previous prime is 20111212120099. The next prime is 20111212120121. The reversal of 20111212120102 is 20102121211102.

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

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 as a sum of consecutive naturals, namely, 5027803030024 + ... + 5027803030027.

It is an arithmetic number, because the mean of its divisors is an integer number (7541704545039).

Almost surely, 2^{20111212120102} is an apocalyptic number.

20111212120102 is a deficient number, since it is larger than the sum of its proper divisors (10055606060054).

20111212120102 is a wasteful number, since it uses less digits than its factorization.

20111212120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055606060053.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111212120102 its reverse (20102121211102), we get a palindrome (40213333331204).

The spelling of 20111212120102 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred two".