20111122120110 has 32 divisors (see below), whose sum is σ = 55161934958592. Its totient is φ = 4596827913120.

The previous prime is 20111122120097. The next prime is 20111122120123. The reversal of 20111122120110 is 1102122111102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20111122120097) and next prime (20111122120123).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20111122120110.

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 15 ways as a sum of consecutive naturals, for example, 47883623886 + ... + 47883624305.

It is an arithmetic number, because the mean of its divisors is an integer number (1723810467456).

Almost surely, 2^{20111122120110} is an apocalyptic number.

20111122120110 is an abundant number, since it is smaller than the sum of its proper divisors (35050812838482).

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

20111122120110 is a wasteful number, since it uses less digits than its factorization.

20111122120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95767248208.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111122120110 its reverse (1102122111102), we get a palindrome (21213244231212).

It can be divided in two parts, 201111 and 22120110, that added together give a triangular number (22321221 = T₆₆₈₁).

The spelling of 20111122120110 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twenty thousand, one hundred ten".