121011101 has 2 divisors, whose sum is σ = 121011102. Its totient is φ = 121011100.

The previous prime is 121011097. The next prime is 121011109. The reversal of 121011101 is 101110121.

It is a happy number.

It is an a-pointer prime, because the next prime (121011109) can be obtained adding 121011101 to its sum of digits (8).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 7695076 = 10645^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011101 - 2² = 121011097 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121011109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505550 + 60505551.

It is an arithmetic number, because the mean of its divisors is an integer number (60505551).

Almost surely, 2^121011101 is an apocalyptic number.

It is an amenable number.

121011101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011101 is an equidigital number, since it uses as much as digits as its factorization.

121011101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 121011101 is about 11000.5045793363. The cubic root of 121011101 is about 494.6238696245.

Adding to 121011101 its reverse (101110121), we get a palindrome (222121222).

The spelling of 121011101 in words is "one hundred twenty-one million, eleven thousand, one hundred one".