201220100011121 has 2 divisors, whose sum is σ = 201220100011122. Its totient is φ = 201220100011120.

The previous prime is 201220100011103. The next prime is 201220100011157. The reversal of 201220100011121 is 121110001022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172876188801121 + 28343911210000 = 13148239^2 + 5323900^2 .

It is a cyclic number.

It is not a de Polignac number, because 201220100011121 - 2¹⁴ = 201220099994737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201220100011096 and 201220100011105.

It is not a weakly prime, because it can be changed into another prime (201220100011321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610050005560 + 100610050005561.

It is an arithmetic number, because the mean of its divisors is an integer number (100610050005561).

Almost surely, 2^{201220100011121} is an apocalyptic number.

It is an amenable number.

201220100011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220100011121 is an equidigital number, since it uses as much as digits as its factorization.

201220100011121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201220100011121 its reverse (121110001022102), we get a palindrome (322330101033223).

The spelling of 201220100011121 in words is "two hundred one trillion, two hundred twenty billion, one hundred million, eleven thousand, one hundred twenty-one".