201120212211221 has 4 divisors (see below), whose sum is σ = 201533190060192. Its totient is φ = 200707234362252.

The previous prime is 201120212211211. The next prime is 201120212211223. The reversal of 201120212211221 is 122112212021102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201120212211221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201120212211193 and 201120212211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201120212211223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206488923755 + ... + 206488924728.

It is an arithmetic number, because the mean of its divisors is an integer number (50383297515048).

Almost surely, 2^{201120212211221} is an apocalyptic number.

It is an amenable number.

201120212211221 is a deficient number, since it is larger than the sum of its proper divisors (412977848971).

201120212211221 is an equidigital number, since it uses as much as digits as its factorization.

201120212211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412977848970.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201120212211221 its reverse (122112212021102), we get a palindrome (323232424232323).

The spelling of 201120212211221 in words is "two hundred one trillion, one hundred twenty billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-one".