121100000121 has 12 divisors (see below), whose sum is σ = 176470208148. Its totient is φ = 80018878464.

The previous prime is 121100000113. The next prime is 121100000141. The reversal of 121100000121 is 121000001121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67894119225 + 53205880896 = 260565^2 + 230664^2 .

It is not a de Polignac number, because 121100000121 - 2³ = 121100000113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121100000111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59536840 + ... + 59538873.

It is an arithmetic number, because the mean of its divisors is an integer number (14705850679).

Almost surely, 2^121100000121 is an apocalyptic number.

It is an amenable number.

121100000121 is a deficient number, since it is larger than the sum of its proper divisors (55370208027).

121100000121 is a wasteful number, since it uses less digits than its factorization.

121100000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119075832 (or 119075829 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121100000121 its reverse (121000001121), we get a palindrome (242100001242).

The spelling of 121100000121 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty-one", and thus it is an aban number.