221010121201 has 8 divisors (see below), whose sum is σ = 230112100008. Its totient is φ = 212084880000.

The previous prime is 221010121159. The next prime is 221010121207. The reversal of 221010121201 is 102121010122.

It can be written as a sum of positive squares in 4 ways, for example, as 861481201 + 220148640000 = 29351^2 + 469200^2 .

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 221010121201 - 2¹⁵ = 221010088433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010121207) 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, 44181850 + ... + 44186851.

It is an arithmetic number, because the mean of its divisors is an integer number (28764012501).

Almost surely, 2^221010121201 is an apocalyptic number.

It is an amenable number.

221010121201 is a deficient number, since it is larger than the sum of its proper divisors (9101978807).

221010121201 is an equidigital number, since it uses as much as digits as its factorization.

221010121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88368803.

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

Adding to 221010121201 its reverse (102121010122), we get a palindrome (323131131323).

The spelling of 221010121201 in words is "two hundred twenty-one billion, ten million, one hundred twenty-one thousand, two hundred one".