121513201 has 4 divisors (see below), whose sum is σ = 122716404. Its totient is φ = 120310000.

The previous prime is 121513193. The next prime is 121513237. The reversal of 121513201 is 102315121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79923600 + 41589601 = 8940^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 121513201 - 2³ = 121513193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121513901) 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, 601450 + ... + 601651.

It is an arithmetic number, because the mean of its divisors is an integer number (30679101).

Almost surely, 2^121513201 is an apocalyptic number.

It is an amenable number.

121513201 is a deficient number, since it is larger than the sum of its proper divisors (1203203).

121513201 is a wasteful number, since it uses less digits than its factorization.

121513201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203202.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 121513201 is about 11023.3026357803. The cubic root of 121513201 is about 495.3070244383.

Adding to 121513201 its reverse (102315121), we get a palindrome (223828322).

The spelling of 121513201 in words is "one hundred twenty-one million, five hundred thirteen thousand, two hundred one".