21201120101 has 8 divisors (see below), whose sum is σ = 24452144640. Its totient is φ = 18005668848.

The previous prime is 21201120097. The next prime is 21201120133. The reversal of 21201120101 is 10102110212.

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 21201120101 - 2² = 21201120097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201120301) 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, 13892501 + ... + 13894026.

It is an arithmetic number, because the mean of its divisors is an integer number (3056518080).

Almost surely, 2^21201120101 is an apocalyptic number.

It is an amenable number.

21201120101 is a deficient number, since it is larger than the sum of its proper divisors (3251024539).

21201120101 is a wasteful number, since it uses less digits than its factorization.

21201120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27786643.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201120101 its reverse (10102110212), we get a palindrome (31303230313).

The spelling of 21201120101 in words is "twenty-one billion, two hundred one million, one hundred twenty thousand, one hundred one".