21130321101 has 8 divisors (see below), whose sum is σ = 28530391680. Its totient is φ = 13908565632.

The previous prime is 21130321063. The next prime is 21130321103. The reversal of 21130321101 is 10112303112.

It is a happy number.

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

It is not a de Polignac number, because 21130321101 - 2¹³ = 21130312909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130321103) 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, 44578500 + ... + 44578973.

It is an arithmetic number, because the mean of its divisors is an integer number (3566298960).

Almost surely, 2^21130321101 is an apocalyptic number.

It is an amenable number.

21130321101 is a deficient number, since it is larger than the sum of its proper divisors (7400070579).

21130321101 is an equidigital number, since it uses as much as digits as its factorization.

21130321101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89157555.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21130321101 its reverse (10112303112), we get a palindrome (31242624213).

The spelling of 21130321101 in words is "twenty-one billion, one hundred thirty million, three hundred twenty-one thousand, one hundred one".