20121144012004 has 24 divisors (see below), whose sum is σ = 41991952722048. Its totient is φ = 8248419284160.

The previous prime is 20121144011993. The next prime is 20121144012007. The reversal of 20121144012004 is 40021044112102.

It is not an unprimeable number, because it can be changed into a prime (20121144012007) 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 7 ways as a sum of consecutive naturals, for example, 15622005577 + ... + 15622006864.

It is an arithmetic number, because the mean of its divisors is an integer number (1749664696752).

Almost surely, 2^{20121144012004} is an apocalyptic number.

It is an amenable number.

20121144012004 is an abundant number, since it is smaller than the sum of its proper divisors (21870808710044).

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

20121144012004 is a wasteful number, since it uses less digits than its factorization.

20121144012004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31244012475 (or 31244012473 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 20121144012004 its reverse (40021044112102), we get a palindrome (60142188124106).

The spelling of 20121144012004 in words is "twenty trillion, one hundred twenty-one billion, one hundred forty-four million, twelve thousand, four".