21003013120231 has 4 divisors (see below), whose sum is σ = 21003119812264. Its totient is φ = 21002906428200.

The previous prime is 21003013120181. The next prime is 21003013120261. The reversal of 21003013120231 is 13202131030012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21003013120231 - 2⁴¹ = 18803989864679 is a prime.

It is a super-2 number, since 2×21003013120231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21003013120199 and 21003013120208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003013120261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53050185 + ... + 53444626.

It is an arithmetic number, because the mean of its divisors is an integer number (5250779953066).

Almost surely, 2^{21003013120231} is an apocalyptic number.

21003013120231 is a deficient number, since it is larger than the sum of its proper divisors (106692033).

21003013120231 is a wasteful number, since it uses less digits than its factorization.

21003013120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106692032.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21003013120231 its reverse (13202131030012), we get a palindrome (34205144150243).

The spelling of 21003013120231 in words is "twenty-one trillion, three billion, thirteen million, one hundred twenty thousand, two hundred thirty-one".