21012302230231 has 16 divisors (see below), whose sum is σ = 22841577712800. Its totient is φ = 19214145394560.

The previous prime is 21012302230223. The next prime is 21012302230273. The reversal of 21012302230231 is 13203220321012.

It is a cyclic number.

It is not a de Polignac number, because 21012302230231 - 2³ = 21012302230223 is a prime.

It is a super-3 number, since 3×21012302230231³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012302230211) 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, 13818865 + ... + 15263866.

It is an arithmetic number, because the mean of its divisors is an integer number (1427598607050).

Almost surely, 2^{21012302230231} is an apocalyptic number.

21012302230231 is a deficient number, since it is larger than the sum of its proper divisors (1829275482569).

21012302230231 is a wasteful number, since it uses less digits than its factorization.

21012302230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29083266.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21012302230231 its reverse (13203220321012), we get a palindrome (34215522551243).

The spelling of 21012302230231 in words is "twenty-one trillion, twelve billion, three hundred two million, two hundred thirty thousand, two hundred thirty-one".