21203311113300 has 72 divisors (see below), whose sum is σ = 64956967238016. Its totient is φ = 5321615336960.

The previous prime is 21203311113269. The next prime is 21203311113373. The reversal of 21203311113300 is 331111330212.

It is a happy number.

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, 2078750892 + ... + 2078761091.

It is an arithmetic number, because the mean of its divisors is an integer number (902180100528).

Almost surely, 2^{21203311113300} is an apocalyptic number.

21203311113300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203311113300 is an abundant number, since it is smaller than the sum of its proper divisors (43753656124716).

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

21203311113300 is a wasteful number, since it uses less digits than its factorization.

21203311113300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157512017 (or 4157512010 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21203311113300 its reverse (331111330212), we get a palindrome (21534422443512).

The spelling of 21203311113300 in words is "twenty-one trillion, two hundred three billion, three hundred eleven million, one hundred thirteen thousand, three hundred".