2101222221201 has 6 divisors (see below), whose sum is σ = 3035098763970. Its totient is φ = 1400814814128.

The previous prime is 2101222221173. The next prime is 2101222221209. The reversal of 2101222221201 is 1021222221012.

It is a happy number.

2101222221201 is a `hidden beast` number, since 21 + 0 + 1 + 222 + 221 + 201 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1736599475601 + 364622745600 = 1317801^2 + 603840^2 .

It is not a de Polignac number, because 2101222221201 - 2¹⁵ = 2101222188433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101222221209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116734567836 + ... + 116734567853.

It is an arithmetic number, because the mean of its divisors is an integer number (505849793995).

Almost surely, 2^{2101222221201} is an apocalyptic number.

It is an amenable number.

2101222221201 is a deficient number, since it is larger than the sum of its proper divisors (933876542769).

2101222221201 is a wasteful number, since it uses less digits than its factorization.

2101222221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233469135695 (or 233469135692 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2101222221201 its reverse (1021222221012), we get a palindrome (3122444442213).

The spelling of 2101222221201 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred one".