201120021121 has 2 divisors, whose sum is σ = 201120021122. Its totient is φ = 201120021120.

The previous prime is 201120021101. The next prime is 201120021163. The reversal of 201120021121 is 121120021102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117621561600 + 83498459521 = 342960^2 + 288961^2 .

It is a cyclic number.

It is not a de Polignac number, because 201120021121 - 2⁷ = 201120020993 is a prime.

It is a super-2 number, since 2×201120021121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201120021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560010560 + 100560010561.

It is an arithmetic number, because the mean of its divisors is an integer number (100560010561).

Almost surely, 2^201120021121 is an apocalyptic number.

It is an amenable number.

201120021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201120021121 is an equidigital number, since it uses as much as digits as its factorization.

201120021121 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 13.

Adding to 201120021121 its reverse (121120021102), we get a palindrome (322240042223).

The spelling of 201120021121 in words is "two hundred one billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".