121010110121 has 2 divisors, whose sum is σ = 121010110122. Its totient is φ = 121010110120.

The previous prime is 121010110099. The next prime is 121010110139. The reversal of 121010110121 is 121011010121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62494500121 + 58515610000 = 249989^2 + 241900^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010110121 - 2⁶ = 121010110057 is a prime.

It is not a weakly prime, because it can be changed into another prime (121010110421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505055060 + 60505055061.

It is an arithmetic number, because the mean of its divisors is an integer number (60505055061).

Almost surely, 2^121010110121 is an apocalyptic number.

It is an amenable number.

121010110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010110121 is an equidigital number, since it uses as much as digits as its factorization.

121010110121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121010110121 its reverse (121011010121), we get a palindrome (242021120242).

The spelling of 121010110121 in words is "one hundred twenty-one billion, ten million, one hundred ten thousand, one hundred twenty-one".