201222121021221 has 8 divisors (see below), whose sum is σ = 268299613625760. Its totient is φ = 134146354548752.

The previous prime is 201222121021183. The next prime is 201222121021223. The reversal of 201222121021221 is 122120121222102.

201222121021221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 201222121021221 - 2¹³ = 201222121013029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222121021223) 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, 431260986 + ... + 431727323.

It is an arithmetic number, because the mean of its divisors is an integer number (33537451703220).

Almost surely, 2^{201222121021221} is an apocalyptic number.

It is an amenable number.

201222121021221 is a deficient number, since it is larger than the sum of its proper divisors (67077492604539).

201222121021221 is an equidigital number, since it uses as much as digits as its factorization.

201222121021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863066035.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201222121021221 its reverse (122120121222102), we get a palindrome (323342242243323).

The spelling of 201222121021221 in words is "two hundred one trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-one".