21203000203331 has 4 divisors (see below), whose sum is σ = 21204416679000. Its totient is φ = 21201583727664.

The previous prime is 21203000203303. The next prime is 21203000203339. The reversal of 21203000203331 is 13330200030212.

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 21203000203331 - 2¹⁴ = 21203000186947 is a prime.

It is a super-2 number, since 2×21203000203331² (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 (21203000203339) 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, 708215381 + ... + 708245318.

It is an arithmetic number, because the mean of its divisors is an integer number (5301104169750).

Almost surely, 2^{21203000203331} is an apocalyptic number.

21203000203331 is a deficient number, since it is larger than the sum of its proper divisors (1416475669).

21203000203331 is a wasteful number, since it uses less digits than its factorization.

21203000203331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416475668.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21203000203331 its reverse (13330200030212), we get a palindrome (34533200233543).

The spelling of 21203000203331 in words is "twenty-one trillion, two hundred three billion, two hundred three thousand, three hundred thirty-one".