21023233331100 has 576 divisors, whose sum is σ = 82126583562240. Its totient is φ = 4009890585600.

The previous prime is 21023233331081. The next prime is 21023233331141. The reversal of 21023233331100 is 113333232012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 53558149 + ... + 53949251.

It is an arithmetic number, because the mean of its divisors is an integer number (142580874240).

Almost surely, 2^{21023233331100} is an apocalyptic number.

21023233331100 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 21023233331100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41063291781120).

21023233331100 is an abundant number, since it is smaller than the sum of its proper divisors (61103350231140).

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

21023233331100 is a wasteful number, since it uses less digits than its factorization.

21023233331100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391330 (or 391323 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21023233331100 its reverse (113333232012), we get a palindrome (21136566563112).

The spelling of 21023233331100 in words is "twenty-one trillion, twenty-three billion, two hundred thirty-three million, three hundred thirty-one thousand, one hundred".