201121121001221 has 32 divisors (see below), whose sum is σ = 215659642368000. Its totient is φ = 187006915263168.

The previous prime is 201121121001161. The next prime is 201121121001223. The reversal of 201121121001221 is 122100121121102.

It is a cyclic number.

It is not a de Polignac number, because 201121121001221 - 2¹⁴ = 201121120984837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121121001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121121001223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1734297986 + ... + 1734413948.

It is an arithmetic number, because the mean of its divisors is an integer number (6739363824000).

Almost surely, 2^{201121121001221} is an apocalyptic number.

It is an amenable number.

201121121001221 is a deficient number, since it is larger than the sum of its proper divisors (14538521366779).

201121121001221 is a wasteful number, since it uses less digits than its factorization.

201121121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122913.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201121121001221 its reverse (122100121121102), we get a palindrome (323221242122323).

The spelling of 201121121001221 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty-one million, one thousand, two hundred twenty-one".