21101002331 has 8 divisors (see below), whose sum is σ = 21496478304. Its totient is φ = 20707125120.

The previous prime is 21101002319. The next prime is 21101002337. The reversal of 21101002331 is 13320010112.

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 21101002331 - 2¹⁴ = 21100985947 is a prime.

It is a super-2 number, since 2×21101002331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101002337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373031 + ... + 425856.

It is an arithmetic number, because the mean of its divisors is an integer number (2687059788).

Almost surely, 2^21101002331 is an apocalyptic number.

21101002331 is a deficient number, since it is larger than the sum of its proper divisors (395475973).

21101002331 is an equidigital number, since it uses as much as digits as its factorization.

21101002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799381.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21101002331 its reverse (13320010112), we get a palindrome (34421012443).

The spelling of 21101002331 in words is "twenty-one billion, one hundred one million, two thousand, three hundred thirty-one".