121202513 has 8 divisors (see below), whose sum is σ = 125570280. Its totient is φ = 116847360.

The previous prime is 121202489. The next prime is 121202527. The reversal of 121202513 is 315202121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14348944 + 106853569 = 3788^2 + 10337^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121202513 - 2⁶ = 121202449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202491 and 121202500.

It is not an unprimeable number, because it can be changed into a prime (121202533) 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, 19193 + ... + 24713.

It is an arithmetic number, because the mean of its divisors is an integer number (15696285).

Almost surely, 2^121202513 is an apocalyptic number.

It is an amenable number.

121202513 is a deficient number, since it is larger than the sum of its proper divisors (4367767).

121202513 is an equidigital number, since it uses as much as digits as its factorization.

121202513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 121202513 is about 11009.2012880136. The cubic root of 121202513 is about 494.8845263413.

Adding to 121202513 its reverse (315202121), we get a palindrome (436404634).

The spelling of 121202513 in words is "one hundred twenty-one million, two hundred two thousand, five hundred thirteen".