20121210304 has 168 divisors, whose sum is σ = 44320401072. Its totient is φ = 9057484800.

The previous prime is 20121210299. The next prime is 20121210367. The reversal of 20121210304 is 40301212102.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123442927 + ... + 123443089.

Almost surely, 2^20121210304 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 20121210304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22160200536).

20121210304 is an abundant number, since it is smaller than the sum of its proper divisors (24199190768).

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

20121210304 is a wasteful number, since it uses less digits than its factorization.

20121210304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121210304 its reverse (40301212102), we get a palindrome (60422422406).

The spelling of 20121210304 in words is "twenty billion, one hundred twenty-one million, two hundred ten thousand, three hundred four".