201001222202221 has 24 divisors (see below), whose sum is σ = 247870373323320. Its totient is φ = 161956646111232.

The previous prime is 201001222202203. The next prime is 201001222202233. The reversal of 201001222202221 is 122202222100102.

It can be written as a sum of positive squares in 4 ways, for example, as 26591957114121 + 174409265088100 = 5156739^2 + 13206410^2 .

It is not a de Polignac number, because 201001222202221 - 2¹³ = 201001222194029 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 (201001222202021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144845020 + ... + 146226133.

It is an arithmetic number, because the mean of its divisors is an integer number (10327932221805).

Almost surely, 2^{201001222202221} is an apocalyptic number.

It is an amenable number.

201001222202221 is a deficient number, since it is larger than the sum of its proper divisors (46869151121099).

201001222202221 is a wasteful number, since it uses less digits than its factorization.

201001222202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291072013 (or 291072006 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201001222202221 its reverse (122202222100102), we get a palindrome (323203444302323).

The spelling of 201001222202221 in words is "two hundred one trillion, one billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-one".