21311313122210 has 8 divisors (see below), whose sum is σ = 38360363619996. Its totient is φ = 8524525248880.

The previous prime is 21311313122201. The next prime is 21311313122227. The reversal of 21311313122210 is 1222131311312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18975162890401 + 2336150231809 = 4356049^2 + 1528447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065565656101 + ... + 1065565656120.

Almost surely, 2^{21311313122210} is an apocalyptic number.

21311313122210 is a deficient number, since it is larger than the sum of its proper divisors (17049050497786).

21311313122210 is a wasteful number, since it uses less digits than its factorization.

21311313122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131131312228.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21311313122210 its reverse (1222131311312), we get a palindrome (22533444433522).

The spelling of 21311313122210 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirteen million, one hundred twenty-two thousand, two hundred ten".