21122332312210 has 16 divisors (see below), whose sum is σ = 38140135701336. Its totient is φ = 8422280138368.

The previous prime is 21122332312171. The next prime is 21122332312261. The reversal of 21122332312210 is 1221323322112.

It can be written as a sum of positive squares in 4 ways, for example, as 6064758304929 + 15057574007281 = 2462673^2 + 3880409^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3331594987 + ... + 3331601326.

Almost surely, 2^{21122332312210} is an apocalyptic number.

21122332312210 is a deficient number, since it is larger than the sum of its proper divisors (17017803389126).

21122332312210 is a wasteful number, since it uses less digits than its factorization.

21122332312210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663196637.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21122332312210 its reverse (1221323322112), we get a palindrome (22343655634322).

The spelling of 21122332312210 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred thirty-two million, three hundred twelve thousand, two hundred ten".