21203040331 has 8 divisors (see below), whose sum is σ = 23150090304. Its totient is φ = 19259240520.

The previous prime is 21203040319. The next prime is 21203040379. The reversal of 21203040331 is 13304030212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21203040331 - 2¹³ = 21203032139 is a prime.

It is a super-2 number, since 2×21203040331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203040299 and 21203040308.

It is not an unprimeable number, because it can be changed into a prime (21203040431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798885 + ... + 824998.

It is an arithmetic number, because the mean of its divisors is an integer number (2893761288).

Almost surely, 2^21203040331 is an apocalyptic number.

21203040331 is a deficient number, since it is larger than the sum of its proper divisors (1947049973).

21203040331 is a wasteful number, since it uses less digits than its factorization.

21203040331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625081.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21203040331 its reverse (13304030212), we get a palindrome (34507070543).

The spelling of 21203040331 in words is "twenty-one billion, two hundred three million, forty thousand, three hundred thirty-one".