21210231233100 has 432 divisors, whose sum is σ = 79529948820000. Its totient is φ = 4320809902080.

The previous prime is 21210231233099. The next prime is 21210231233131. The reversal of 21210231233100 is 133213201212.

It is a super-2 number, since 2×21210231233100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3628276 + ... + 7455524.

It is an arithmetic number, because the mean of its divisors is an integer number (184097103750).

Almost surely, 2^{21210231233100} is an apocalyptic number.

21210231233100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210231233100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39764974410000).

21210231233100 is an abundant number, since it is smaller than the sum of its proper divisors (58319717586900).

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

21210231233100 is a wasteful number, since it uses less digits than its factorization.

21210231233100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3827322 (or 3827308 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21210231233100 its reverse (133213201212), we get a palindrome (21343444434312).

The spelling of 21210231233100 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty-one million, two hundred thirty-three thousand, one hundred".