1213220203 has 4 divisors (see below), whose sum is σ = 1306544848. Its totient is φ = 1119895560.

The previous prime is 1213220201. The next prime is 1213220207. The reversal of 1213220203 is 3020223121.

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 1213220203 - 2¹ = 1213220201 is a prime.

It is a super-2 number, since 2×1213220203² = 2943806521934722418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213220201) 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, 46662303 + ... + 46662328.

It is an arithmetic number, because the mean of its divisors is an integer number (326636212).

Almost surely, 2^1213220203 is an apocalyptic number.

1213220203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213220203 is a deficient number, since it is larger than the sum of its proper divisors (93324645).

1213220203 is an equidigital number, since it uses as much as digits as its factorization.

1213220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93324644.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1213220203 is about 34831.3106701427. The cubic root of 1213220203 is about 1066.5467039677.

Adding to 1213220203 its reverse (3020223121), we get a palindrome (4233443324).

The spelling of 1213220203 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, two hundred three".