20121220300 has 36 divisors (see below), whose sum is σ = 43673499856. Its totient is φ = 8046561600.

The previous prime is 20121220291. The next prime is 20121220309. The reversal of 20121220300 is 302212102.

It is an interprime number because it is at equal distance from previous prime (20121220291) and next prime (20121220309).

It is a super-2 number, since 2×20121220300² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121220309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 440329 + ... + 483871.

Almost surely, 2^20121220300 is an apocalyptic number.

20121220300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121220300 is an abundant number, since it is smaller than the sum of its proper divisors (23552279556).

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

20121220300 is a wasteful number, since it uses less digits than its factorization.

20121220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48178 (or 48171 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20121220300 its reverse (302212102), we get a palindrome (20423432402).

The spelling of 20121220300 in words is "twenty billion, one hundred twenty-one million, two hundred twenty thousand, three hundred".