21021331101232 has 240 divisors, whose sum is σ = 52889479856640. Its totient is φ = 8000044147200.

The previous prime is 21021331101223. The next prime is 21021331101257. The reversal of 21021331101232 is 23210113312012.

It is a super-2 number, since 2×21021331101232² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206261007 + ... + 206362897.

It is an arithmetic number, because the mean of its divisors is an integer number (220372832736).

Almost surely, 2^{21021331101232} is an apocalyptic number.

21021331101232 is a gapful number since it is divisible by the number (22) 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 21021331101232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26444739928320).

21021331101232 is an abundant number, since it is smaller than the sum of its proper divisors (31868148755408).

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

21021331101232 is a wasteful number, since it uses less digits than its factorization.

21021331101232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102480 (or 102467 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21021331101232 its reverse (23210113312012), we get a palindrome (44231444413244).

The spelling of 21021331101232 in words is "twenty-one trillion, twenty-one billion, three hundred thirty-one million, one hundred one thousand, two hundred thirty-two".