20111212102102 has 32 divisors (see below), whose sum is σ = 33236648206848. Its totient is φ = 9050526300000.

The previous prime is 20111212102067. The next prime is 20111212102103. The reversal of 20111212102102 is 20120121211102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111212102103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49863027 + ... + 50264737.

It is an arithmetic number, because the mean of its divisors is an integer number (1038645256464).

Almost surely, 2^{20111212102102} is an apocalyptic number.

20111212102102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111212102102 is a deficient number, since it is larger than the sum of its proper divisors (13125436104746).

20111212102102 is a wasteful number, since it uses less digits than its factorization.

20111212102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424356.

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

Adding to 20111212102102 its reverse (20120121211102), we get a palindrome (40231333313204).

The spelling of 20111212102102 in words is "twenty trillion, one hundred eleven billion, two hundred twelve million, one hundred two thousand, one hundred two".