20111102102 has 64 divisors (see below), whose sum is σ = 41381383680. Its totient is φ = 7093910016.

The previous prime is 20111102093. The next prime is 20111102111. The reversal of 20111102102 is 20120111102.

It is an interprime number because it is at equal distance from previous prime (20111102093) and next prime (20111102111).

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 31 ways as a sum of consecutive naturals, for example, 112268 + ... + 229839.

It is an arithmetic number, because the mean of its divisors is an integer number (646584120).

Almost surely, 2^20111102102 is an apocalyptic number.

20111102102 is an abundant number, since it is smaller than the sum of its proper divisors (21270281578).

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

20111102102 is a wasteful number, since it uses less digits than its factorization.

20111102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342165.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20111102102 its reverse (20120111102), we get a palindrome (40231213204).

The spelling of 20111102102 in words is "twenty billion, one hundred eleven million, one hundred two thousand, one hundred two".