21011312325210 has 48 divisors (see below), whose sum is σ = 50514720464736. Its totient is φ = 5593303360512.

The previous prime is 21011312325137. The next prime is 21011312325217. The reversal of 21011312325210 is 1252321311012.

It is not an unprimeable number, because it can be changed into a prime (21011312325217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8936029 + ... + 11039711.

It is an arithmetic number, because the mean of its divisors is an integer number (1052390009682).

Almost surely, 2^{21011312325210} is an apocalyptic number.

21011312325210 is an abundant number, since it is smaller than the sum of its proper divisors (29503408139526).

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

21011312325210 is an equidigital number, since it uses as much as digits as its factorization.

21011312325210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104847 (or 2104270 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21011312325210 its reverse (1252321311012), we get a palindrome (22263633636222).

The spelling of 21011312325210 in words is "twenty-one trillion, eleven billion, three hundred twelve million, three hundred twenty-five thousand, two hundred ten".