1212213203 has 16 divisors (see below), whose sum is σ = 1320120000. Its totient is φ = 1108463616.

The previous prime is 1212213193. The next prime is 1212213227. The reversal of 1212213203 is 3023122121.

It is a cyclic number.

It is not a de Polignac number, because 1212213203 - 2⁴ = 1212213187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212213293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784850 + ... + 786392.

It is an arithmetic number, because the mean of its divisors is an integer number (82507500).

Almost surely, 2^1212213203 is an apocalyptic number.

1212213203 is a deficient number, since it is larger than the sum of its proper divisors (107906797).

1212213203 is a wasteful number, since it uses less digits than its factorization.

1212213203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212213203 is about 34816.8522844900. The cubic root of 1212213203 is about 1066.2515363861.

Adding to 1212213203 its reverse (3023122121), we get a palindrome (4235335324).

The spelling of 1212213203 in words is "one billion, two hundred twelve million, two hundred thirteen thousand, two hundred three".