20111111210102 has 48 divisors (see below), whose sum is σ = 33219191880000. Its totient is φ = 9124667798400.

The previous prime is 20111111210093. The next prime is 20111111210149. The reversal of 20111111210102 is 20101211111102.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 368112524 + ... + 368167152.

It is an arithmetic number, because the mean of its divisors is an integer number (692066497500).

Almost surely, 2^{20111111210102} is an apocalyptic number.

20111111210102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111111210102 is a deficient number, since it is larger than the sum of its proper divisors (13108080669898).

20111111210102 is a wasteful number, since it uses less digits than its factorization.

20111111210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57413 (or 57402 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20111111210102 its reverse (20101211111102), we get a palindrome (40212322321204).

The spelling of 20111111210102 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, two hundred ten thousand, one hundred two".