121012221101 has 2 divisors, whose sum is σ = 121012221102. Its totient is φ = 121012221100.

The previous prime is 121012221049. The next prime is 121012221157. The reversal of 121012221101 is 101122210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120985708900 + 26512201 = 347830^2 + 5149^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012221101 - 2⁶ = 121012221037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121012221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506110550 + 60506110551.

It is an arithmetic number, because the mean of its divisors is an integer number (60506110551).

Almost surely, 2^121012221101 is an apocalyptic number.

It is an amenable number.

121012221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012221101 is an equidigital number, since it uses as much as digits as its factorization.

121012221101 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 121012221101 its reverse (101122210121), we get a palindrome (222134431222).

The spelling of 121012221101 in words is "one hundred twenty-one billion, twelve million, two hundred twenty-one thousand, one hundred one".