21031030300321 has 16 divisors (see below), whose sum is σ = 21608397760768. Its totient is φ = 20454136588800.

The previous prime is 21031030300237. The next prime is 21031030300337. The reversal of 21031030300321 is 12300303013012.

It is not a de Polignac number, because 21031030300321 - 2¹⁷ = 21031030169249 is a prime.

It is a super-2 number, since 2×21031030300321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031030370321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1184104081 + ... + 1184121841.

It is an arithmetic number, because the mean of its divisors is an integer number (1350524860048).

Almost surely, 2^{21031030300321} is an apocalyptic number.

It is an amenable number.

21031030300321 is a deficient number, since it is larger than the sum of its proper divisors (577367460447).

21031030300321 is a wasteful number, since it uses less digits than its factorization.

21031030300321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29272.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21031030300321 its reverse (12300303013012), we get a palindrome (33331333313333).

The spelling of 21031030300321 in words is "twenty-one trillion, thirty-one billion, thirty million, three hundred thousand, three hundred twenty-one".