1213203113 has 8 divisors (see below), whose sum is σ = 1297041408. Its totient is φ = 1130750784.

The previous prime is 1213203091. The next prime is 1213203119. The reversal of 1213203113 is 3113023121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213203113 - 2¹⁴ = 1213186729 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 a junction number, because it is equal to n+sod(n) for n = 1213203091 and 1213203100.

It is not an unprimeable number, because it can be changed into a prime (1213203119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344681 + ... + 348182.

It is an arithmetic number, because the mean of its divisors is an integer number (162130176).

Almost surely, 2^1213203113 is an apocalyptic number.

It is an amenable number.

1213203113 is a deficient number, since it is larger than the sum of its proper divisors (83838295).

1213203113 is a wasteful number, since it uses less digits than its factorization.

1213203113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692983.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1213203113 is about 34831.0653440287. The cubic root of 1213203113 is about 1066.5416959818.

Adding to 1213203113 its reverse (3113023121), we get a palindrome (4326226234).

The spelling of 1213203113 in words is "one billion, two hundred thirteen million, two hundred three thousand, one hundred thirteen".