1212020003 has 4 divisors (see below), whose sum is σ = 1212455208. Its totient is φ = 1211584800.

The previous prime is 1212019993. The next prime is 1212020009. The reversal of 1212020003 is 3000202121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212020003 - 2²⁸ = 943584547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212020009) 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, 213398 + ... + 219003.

It is an arithmetic number, because the mean of its divisors is an integer number (303113802).

Almost surely, 2^1212020003 is an apocalyptic number.

1212020003 is a deficient number, since it is larger than the sum of its proper divisors (435205).

1212020003 is an equidigital number, since it uses as much as digits as its factorization.

1212020003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435204.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1212020003 is about 34814.0776554543. The cubic root of 1212020003 is about 1066.1948877314.

Adding to 1212020003 its reverse (3000202121), we get a palindrome (4212222124).

It can be divided in two parts, 12120 and 20003, that added together give a palindrome (32123).

The spelling of 1212020003 in words is "one billion, two hundred twelve million, twenty thousand, three".