201101022122221 has 16 divisors (see below), whose sum is σ = 217945793218608. Its totient is φ = 184454431027200.

The previous prime is 201101022122201. The next prime is 201101022122309. The reversal of 201101022122221 is 122221220101102.

It can be written as a sum of positive squares in 8 ways, for example, as 114854324774121 + 86246697348100 = 10717011^2 + 9286910^2 .

It is a cyclic number.

It is not a de Polignac number, because 201101022122221 - 2³³ = 201092432187629 is a prime.

It is a super-3 number, since 3×201101022122221³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101022122201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32249710 + ... + 37976911.

It is an arithmetic number, because the mean of its divisors is an integer number (13621612076163).

Almost surely, 2^{201101022122221} is an apocalyptic number.

It is an amenable number.

201101022122221 is a deficient number, since it is larger than the sum of its proper divisors (16844771096387).

201101022122221 is a wasteful number, since it uses less digits than its factorization.

201101022122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70228032.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201101022122221 its reverse (122221220101102), we get a palindrome (323322242223323).

The spelling of 201101022122221 in words is "two hundred one trillion, one hundred one billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".