1203013121 has 8 divisors (see below), whose sum is σ = 1218441000. Its totient is φ = 1187654400.

The previous prime is 1203013111. The next prime is 1203013129. The reversal of 1203013121 is 1213103021.

It can be written as a sum of positive squares in 4 ways, for example, as 378691600 + 824321521 = 19460^2 + 28711^2 .

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 1203013121 - 2¹⁴ = 1202996737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203013096 and 1203013105.

It is not an unprimeable number, because it can be changed into a prime (1203013129) 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, 18185 + ... + 52313.

It is an arithmetic number, because the mean of its divisors is an integer number (152305125).

Almost surely, 2^1203013121 is an apocalyptic number.

It is an amenable number.

1203013121 is a deficient number, since it is larger than the sum of its proper divisors (15427879).

1203013121 is a wasteful number, since it uses less digits than its factorization.

1203013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34579.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1203013121 is about 34684.4795405668. The cubic root of 1203013121 is about 1063.5472476957.

Adding to 1203013121 its reverse (1213103021), we get a palindrome (2416116142).

The spelling of 1203013121 in words is "one billion, two hundred three million, thirteen thousand, one hundred twenty-one".