20112434121 has 32 divisors (see below), whose sum is σ = 29150937088. Its totient is φ = 12260808000.

The previous prime is 20112434101. The next prime is 20112434149. The reversal of 20112434121 is 12143421102.

It is not a de Polignac number, because 20112434121 - 2⁷ = 20112433993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112434101) 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 31 ways as a sum of consecutive naturals, for example, 3717000 + ... + 3722406.

It is an arithmetic number, because the mean of its divisors is an integer number (910966784).

Almost surely, 2^20112434121 is an apocalyptic number.

It is an amenable number.

20112434121 is a deficient number, since it is larger than the sum of its proper divisors (9038502967).

20112434121 is a wasteful number, since it uses less digits than its factorization.

20112434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20112434121 its reverse (12143421102), we get a palindrome (32255855223).

The spelling of 20112434121 in words is "twenty billion, one hundred twelve million, four hundred thirty-four thousand, one hundred twenty-one".