121205013 has 8 divisors (see below), whose sum is σ = 161695968. Its totient is φ = 80758704.

The previous prime is 121204997. The next prime is 121205027. The reversal of 121205013 is 310502121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121205013 - 2⁴ = 121204997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121204983 and 121205001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121205033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4206 + ... + 16127.

It is an arithmetic number, because the mean of its divisors is an integer number (20211996).

Almost surely, 2^121205013 is an apocalyptic number.

It is an amenable number.

121205013 is a deficient number, since it is larger than the sum of its proper divisors (40490955).

121205013 is a wasteful number, since it uses less digits than its factorization.

121205013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22323.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 121205013 is about 11009.3148288166. The cubic root of 121205013 is about 494.8879289187.

Adding to 121205013 its reverse (310502121), we get a palindrome (431707134).

The spelling of 121205013 in words is "one hundred twenty-one million, two hundred five thousand, thirteen".