20111121300 has 72 divisors (see below), whose sum is σ = 58722109600. Its totient is φ = 5313755520.

The previous prime is 20111121299. The next prime is 20111121301. The reversal of 20111121300 is 312111102.

It is an interprime number because it is at equal distance from previous prime (20111121299) and next prime (20111121301).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111121301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274810 + ... + 340209.

Almost surely, 2^20111121300 is an apocalyptic number.

20111121300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111121300 is an abundant number, since it is smaller than the sum of its proper divisors (38610988300).

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

20111121300 is a wasteful number, since it uses less digits than its factorization.

20111121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615145 (or 615138 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20111121300 its reverse (312111102), we get a palindrome (20423232402).

The spelling of 20111121300 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, three hundred".