121203013 has 4 divisors (see below), whose sum is σ = 128332620. Its totient is φ = 114073408.

The previous prime is 121202981. The next prime is 121203037. The reversal of 121203013 is 310302121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310302121 = 53 ⋅5854757.

It can be written as a sum of positive squares in 2 ways, for example, as 98763844 + 22439169 = 9938^2 + 4737^2 .

It is a cyclic number.

It is not a de Polignac number, because 121203013 - 2⁵ = 121202981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202984 and 121203002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203113) 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, 3564778 + ... + 3564811.

It is an arithmetic number, because the mean of its divisors is an integer number (32083155).

Almost surely, 2^121203013 is an apocalyptic number.

It is an amenable number.

121203013 is a deficient number, since it is larger than the sum of its proper divisors (7129607).

121203013 is an equidigital number, since it uses as much as digits as its factorization.

121203013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129606.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121203013 is about 11009.2239962679. The cubic root of 121203013 is about 494.8852068605.

Adding to 121203013 its reverse (310302121), we get a palindrome (431505134).

The spelling of 121203013 in words is "one hundred twenty-one million, two hundred three thousand, thirteen".