1213143103 has 12 divisors (see below), whose sum is σ = 1356534760. Its totient is φ = 1081683072.

The previous prime is 1213143101. The next prime is 1213143121. The reversal of 1213143103 is 3013413121.

It is not a de Polignac number, because 1213143103 - 2¹ = 1213143101 is a prime.

It is a super-3 number, since 3×1213143103³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213143101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104976 + ... + 115957.

Almost surely, 2^1213143103 is an apocalyptic number.

1213143103 is a deficient number, since it is larger than the sum of its proper divisors (143391657).

1213143103 is a wasteful number, since it uses less digits than its factorization.

1213143103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220986 (or 220969 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1213143103 is about 34830.2038897277. The cubic root of 1213143103 is about 1066.5241105169.

Adding to 1213143103 its reverse (3013413121), we get a palindrome (4226556224).

The spelling of 1213143103 in words is "one billion, two hundred thirteen million, one hundred forty-three thousand, one hundred three".