121015121 has 4 divisors (see below), whose sum is σ = 126276672. Its totient is φ = 115753572.

The previous prime is 121015099. The next prime is 121015133. The reversal of 121015121 is 121510121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-121015121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121015096 and 121015105.

It is not an unprimeable number, because it can be changed into a prime (121015151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2630741 + ... + 2630786.

It is an arithmetic number, because the mean of its divisors is an integer number (31569168).

Almost surely, 2^121015121 is an apocalyptic number.

It is an amenable number.

121015121 is a deficient number, since it is larger than the sum of its proper divisors (5261551).

121015121 is an equidigital number, since it uses as much as digits as its factorization.

121015121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261550.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 121015121 is about 11000.6872967101. The cubic root of 121015121 is about 494.6293467141.

Adding to 121015121 its reverse (121510121), we get a palindrome (242525242).

The spelling of 121015121 in words is "one hundred twenty-one million, fifteen thousand, one hundred twenty-one".