21311200312210 has 8 divisors (see below), whose sum is σ = 38360160561996. Its totient is φ = 8524480124880.

The previous prime is 21311200312187. The next prime is 21311200312223. The reversal of 21311200312210 is 1221300211312.

It can be written as a sum of positive squares in 2 ways, for example, as 19788698505601 + 1522501806609 = 4448449^2 + 1233897^2 .

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, 1065560015601 + ... + 1065560015620.

Almost surely, 2^{21311200312210} is an apocalyptic number.

21311200312210 is a deficient number, since it is larger than the sum of its proper divisors (17048960249786).

21311200312210 is a wasteful number, since it uses less digits than its factorization.

21311200312210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131120031228.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21311200312210 its reverse (1221300211312), we get a palindrome (22532500523522).

The spelling of 21311200312210 in words is "twenty-one trillion, three hundred eleven billion, two hundred million, three hundred twelve thousand, two hundred ten".