20111121102 has 32 divisors (see below), whose sum is σ = 43704990720. Its totient is φ = 6146012160.

The previous prime is 20111121097. The next prime is 20111121103. The reversal of 20111121102 is 20112111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111121103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841843 + ... + 2848910.

It is an arithmetic number, because the mean of its divisors is an integer number (1365780960).

Almost surely, 2^20111121102 is an apocalyptic number.

20111121102 is an abundant number, since it is smaller than the sum of its proper divisors (23593869618).

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

20111121102 is a wasteful number, since it uses less digits than its factorization.

20111121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690808.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111121102 its reverse (20112111102), we get a palindrome (40223232204).

The spelling of 20111121102 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred two".