20121212322 has 16 divisors (see below), whose sum is σ = 44713805280. Its totient is φ = 6707070756.

The previous prime is 20121212317. The next prime is 20121212329. The reversal of 20121212322 is 22321212102.

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 = 20121212295 and 20121212304.

It is not an unprimeable number, because it can be changed into a prime (20121212329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186307468 + ... + 186307575.

It is an arithmetic number, because the mean of its divisors is an integer number (2794612830).

Almost surely, 2^20121212322 is an apocalyptic number.

20121212322 is an abundant number, since it is smaller than the sum of its proper divisors (24592592958).

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

20121212322 is a wasteful number, since it uses less digits than its factorization.

20121212322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372615054 (or 372615048 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20121212322 its reverse (22321212102), we get a palindrome (42442424424).

The spelling of 20121212322 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-two".