21031113332010 has 128 divisors (see below), whose sum is σ = 52265967206400. Its totient is φ = 5410407144960.

The previous prime is 21031113331997. The next prime is 21031113332011. The reversal of 21031113332010 is 1023331113012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21031113332011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1157518206 + ... + 1157536374.

It is an arithmetic number, because the mean of its divisors is an integer number (408327868800).

Almost surely, 2^{21031113332010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031113332010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26132983603200).

21031113332010 is an abundant number, since it is smaller than the sum of its proper divisors (31234853874390).

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

21031113332010 is a wasteful number, since it uses less digits than its factorization.

21031113332010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22036.

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

Adding to 21031113332010 its reverse (1023331113012), we get a palindrome (22054444445022).

The spelling of 21031113332010 in words is "twenty-one trillion, thirty-one billion, one hundred thirteen million, three hundred thirty-two thousand, ten".