20123221412 has 48 divisors (see below), whose sum is σ = 41200723200. Its totient is φ = 8596324800.

The previous prime is 20123221369. The next prime is 20123221451. The reversal of 20123221412 is 21412232102.

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, 403112 + ... + 450272.

It is an arithmetic number, because the mean of its divisors is an integer number (858348400).

Almost surely, 2^20123221412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123221412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20600361600).

20123221412 is an abundant number, since it is smaller than the sum of its proper divisors (21077501788).

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

20123221412 is a wasteful number, since it uses less digits than its factorization.

20123221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47497 (or 47481 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20123221412 its reverse (21412232102), we get a palindrome (41535453514).

The spelling of 20123221412 in words is "twenty billion, one hundred twenty-three million, two hundred twenty-one thousand, four hundred twelve".