1201011003 has 16 divisors (see below), whose sum is σ = 1796554240. Its totient is φ = 792898632.

The previous prime is 1201011001. The next prime is 1201011011. The reversal of 1201011003 is 3001101021.

It is not a de Polignac number, because 1201011003 - 2¹ = 1201011001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213151 + ... + 218712.

It is an arithmetic number, because the mean of its divisors is an integer number (112284640).

Almost surely, 2^1201011003 is an apocalyptic number.

1201011003 is a deficient number, since it is larger than the sum of its proper divisors (595543237).

1201011003 is a wasteful number, since it uses less digits than its factorization.

1201011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431975 (or 431969 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1201011003 is about 34655.6056504572. The cubic root of 1201011003 is about 1062.9569162460.

Adding to 1201011003 its reverse (3001101021), we get a palindrome (4202112024).

It can be divided in two parts, 120101 and 1003, that added together give a square (121104 = 348²).

The spelling of 1201011003 in words is "one billion, two hundred one million, eleven thousand, three".