121021201121 has 2 divisors, whose sum is σ = 121021201122. Its totient is φ = 121021201120.

The previous prime is 121021201079. The next prime is 121021201151. The reversal of 121021201121 is 121102120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102874147600 + 18147053521 = 320740^2 + 134711^2 .

It is an emirp because it is prime and its reverse (121102120121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121021201121 - 2¹⁴ = 121021184737 is a prime.

It is a super-2 number, since 2×121021201121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021201096 and 121021201105.

It is not a weakly prime, because it can be changed into another prime (121021201151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510600560 + 60510600561.

It is an arithmetic number, because the mean of its divisors is an integer number (60510600561).

Almost surely, 2^121021201121 is an apocalyptic number.

It is an amenable number.

121021201121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021201121 is an equidigital number, since it uses as much as digits as its factorization.

121021201121 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 121021201121 its reverse (121102120121), we get a palindrome (242123321242).

The spelling of 121021201121 in words is "one hundred twenty-one billion, twenty-one million, two hundred one thousand, one hundred twenty-one".