21101110061 has 8 divisors (see below), whose sum is σ = 21889392000. Its totient is φ = 20325857760.

The previous prime is 21101110021. The next prime is 21101110081. The reversal of 21101110061 is 16001110112.

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 21101110061 - 2¹⁴ = 21101093677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101110001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3254111 + ... + 3260588.

It is an arithmetic number, because the mean of its divisors is an integer number (2736174000).

Almost surely, 2^21101110061 is an apocalyptic number.

It is an amenable number.

21101110061 is a deficient number, since it is larger than the sum of its proper divisors (788281939).

21101110061 is an equidigital number, since it uses as much as digits as its factorization.

21101110061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6514819.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21101110061 its reverse (16001110112), we get a palindrome (37102220173).

The spelling of 21101110061 in words is "twenty-one billion, one hundred one million, one hundred ten thousand, sixty-one".