21311331120210 has 16 divisors (see below), whose sum is σ = 51147194688576. Its totient is φ = 5683021632048.

The previous prime is 21311331120203. The next prime is 21311331120217. The reversal of 21311331120210 is 1202113311312.

It is an interprime number because it is at equal distance from previous prime (21311331120203) and next prime (21311331120217).

It is not an unprimeable number, because it can be changed into a prime (21311331120217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355188851974 + ... + 355188852033.

It is an arithmetic number, because the mean of its divisors is an integer number (3196699668036).

Almost surely, 2^{21311331120210} is an apocalyptic number.

21311331120210 is an abundant number, since it is smaller than the sum of its proper divisors (29835863568366).

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

21311331120210 is a wasteful number, since it uses less digits than its factorization.

21311331120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710377704017.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21311331120210 its reverse (1202113311312), we get a palindrome (22513444431522).

The spelling of 21311331120210 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirty-one million, one hundred twenty thousand, two hundred ten".