20124121122 has 24 divisors (see below), whose sum is σ = 49831157376. Its totient is φ = 5749748856.

The previous prime is 20124121117. The next prime is 20124121123. The reversal of 20124121122 is 22112142102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20124121095 and 20124121104.

It is not an unprimeable number, because it can be changed into a prime (20124121123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79857498 + ... + 79857749.

It is an arithmetic number, because the mean of its divisors is an integer number (2076298224).

Almost surely, 2^20124121122 is an apocalyptic number.

20124121122 is an abundant number, since it is smaller than the sum of its proper divisors (29707036254).

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

20124121122 is a wasteful number, since it uses less digits than its factorization.

20124121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159715262 (or 159715259 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20124121122 its reverse (22112142102), we get a palindrome (42236263224).

It can be divided in two parts, 20124 and 121122, that added together give a triangular number (141246 = T₅₃₁).

The spelling of 20124121122 in words is "twenty billion, one hundred twenty-four million, one hundred twenty-one thousand, one hundred twenty-two".