20121111101102 has 16 divisors (see below), whose sum is σ = 33018727784112. Its totient is φ = 9120050353920.

The previous prime is 20121111101011. The next prime is 20121111101129. The reversal of 20121111101102 is 20110111112102.

It is a super-2 number, since 2×20121111101102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295453933 + ... + 1295469464.

It is an arithmetic number, because the mean of its divisors is an integer number (2063670486507).

Almost surely, 2^{20121111101102} is an apocalyptic number.

20121111101102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121111101102 is a deficient number, since it is larger than the sum of its proper divisors (12897616683010).

20121111101102 is a wasteful number, since it uses less digits than its factorization.

20121111101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590923763.

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

Adding to 20121111101102 its reverse (20110111112102), we get a palindrome (40231222213204).

The spelling of 20121111101102 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred one thousand, one hundred two".