121151105115 has 32 divisors (see below), whose sum is σ = 211865020416. Its totient is φ = 58851386880.

The previous prime is 121151105111. The next prime is 121151105129. The reversal of 121151105115 is 511501151121.

It is a happy number.

It is not a de Polignac number, because 121151105115 - 2² = 121151105111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121151105111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7655037 + ... + 7670846.

It is an arithmetic number, because the mean of its divisors is an integer number (6620781888).

Almost surely, 2^121151105115 is an apocalyptic number.

121151105115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121151105115 is a deficient number, since it is larger than the sum of its proper divisors (90713915301).

121151105115 is a wasteful number, since it uses less digits than its factorization.

121151105115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15325939.

The product of its (nonzero) digits is 250, while the sum is 24.

Adding to 121151105115 its reverse (511501151121), we get a palindrome (632652256236).

The spelling of 121151105115 in words is "one hundred twenty-one billion, one hundred fifty-one million, one hundred five thousand, one hundred fifteen".