1213142203 has 16 divisors (see below), whose sum is σ = 1495682496. Its totient is φ = 958187520.

The previous prime is 1213142201. The next prime is 1213142207. The reversal of 1213142203 is 3022413121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1213142203 - 2¹ = 1213142201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213142201) 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, 42723 + ... + 65203.

It is an arithmetic number, because the mean of its divisors is an integer number (93480156).

Almost surely, 2^1213142203 is an apocalyptic number.

1213142203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213142203 is a deficient number, since it is larger than the sum of its proper divisors (282540293).

1213142203 is a wasteful number, since it uses less digits than its factorization.

1213142203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23094.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1213142203 is about 34830.1909699043. The cubic root of 1213142203 is about 1066.5238467744.

Adding to 1213142203 its reverse (3022413121), we get a palindrome (4235555324).

The spelling of 1213142203 in words is "one billion, two hundred thirteen million, one hundred forty-two thousand, two hundred three".