221201012101 has 8 divisors (see below), whose sum is σ = 221801581208. Its totient is φ = 220600800000.

The previous prime is 221201012093. The next prime is 221201012129. The reversal of 221201012101 is 101210102122.

It can be written as a sum of positive squares in 4 ways, for example, as 24376576900 + 196824435201 = 156130^2 + 443649^2 .

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 221201012101 - 2³ = 221201012093 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 (221201012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175881 + ... + 1350961.

It is an arithmetic number, because the mean of its divisors is an integer number (27725197651).

Almost surely, 2^221201012101 is an apocalyptic number.

It is an amenable number.

221201012101 is a deficient number, since it is larger than the sum of its proper divisors (600569107).

221201012101 is a wasteful number, since it uses less digits than its factorization.

221201012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178503.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221201012101 its reverse (101210102122), we get a palindrome (322411114223).

The spelling of 221201012101 in words is "two hundred twenty-one billion, two hundred one million, twelve thousand, one hundred one".