21211120101 has 8 divisors (see below), whose sum is σ = 28291200544. Its totient is φ = 14135893200.

The previous prime is 21211120081. The next prime is 21211120121. The reversal of 21211120101 is 10102111212.

It is an interprime number because it is at equal distance from previous prime (21211120081) and next prime (21211120121).

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

It is not a de Polignac number, because 21211120101 - 2¹⁸ = 21210857957 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 (21211120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203175 + ... + 1220676.

It is an arithmetic number, because the mean of its divisors is an integer number (3536400068).

Almost surely, 2^21211120101 is an apocalyptic number.

It is an amenable number.

21211120101 is a deficient number, since it is larger than the sum of its proper divisors (7080080443).

21211120101 is a wasteful number, since it uses less digits than its factorization.

21211120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426771.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21211120101 its reverse (10102111212), we get a palindrome (31313231313).

The spelling of 21211120101 in words is "twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred one".