1213217134 has 4 divisors (see below), whose sum is σ = 1819825704. Its totient is φ = 606608566.

The previous prime is 1213217123. The next prime is 1213217143. The reversal of 1213217134 is 4317123121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4317123121 = 71 ⋅60804551.

It is a junction number, because it is equal to n+sod(n) for n = 1213217099 and 1213217108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303304282 + ... + 303304285.

It is an arithmetic number, because the mean of its divisors is an integer number (454956426).

Almost surely, 2^1213217134 is an apocalyptic number.

1213217134 is a deficient number, since it is larger than the sum of its proper divisors (606608570).

1213217134 is an equidigital number, since it uses as much as digits as its factorization.

1213217134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606608569.

The product of its digits is 1008, while the sum is 25.

The square root of 1213217134 is about 34831.2666149252. The cubic root of 1213217134 is about 1066.5458046435.

The spelling of 1213217134 in words is "one billion, two hundred thirteen million, two hundred seventeen thousand, one hundred thirty-four".