210312101300021 has 12 divisors (see below), whose sum is σ = 253672847158752. Its totient is φ = 170779751429544.

The previous prime is 210312101300011. The next prime is 210312101300047. The reversal of 210312101300021 is 120003101213012.

It is not a de Polignac number, because 210312101300021 - 2²² = 210312097105717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210312101300011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41612997335 + ... + 41613002388.

It is an arithmetic number, because the mean of its divisors is an integer number (21139403929896).

Almost surely, 2^{210312101300021} is an apocalyptic number.

It is an amenable number.

210312101300021 is a deficient number, since it is larger than the sum of its proper divisors (43360745858731).

210312101300021 is an equidigital number, since it uses as much as digits as its factorization.

210312101300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83225999768 (or 83225999749 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 210312101300021 its reverse (120003101213012), we get a palindrome (330315202513033).

The spelling of 210312101300021 in words is "two hundred ten trillion, three hundred twelve billion, one hundred one million, three hundred thousand, twenty-one".