21331030101 has 4 divisors (see below), whose sum is σ = 28441373472. Its totient is φ = 14220686732.

The previous prime is 21331030003. The next prime is 21331030183. The reversal of 21331030101 is 10103013312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21331030101 - 2¹⁰ = 21331029077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331030601) 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, 3555171681 + ... + 3555171686.

It is an arithmetic number, because the mean of its divisors is an integer number (7110343368).

Almost surely, 2^21331030101 is an apocalyptic number.

It is an amenable number.

21331030101 is a deficient number, since it is larger than the sum of its proper divisors (7110343371).

21331030101 is an equidigital number, since it uses as much as digits as its factorization.

21331030101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110343370.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21331030101 its reverse (10103013312), we get a palindrome (31434043413).

The spelling of 21331030101 in words is "twenty-one billion, three hundred thirty-one million, thirty thousand, one hundred one".