1213220716 has 12 divisors (see below), whose sum is σ = 2123559088. Its totient is φ = 606489552.

The previous prime is 1213220707. The next prime is 1213220719. The reversal of 1213220716 is 6170223121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1213220719) 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, 5331 + ... + 49546.

Almost surely, 2^1213220716 is an apocalyptic number.

It is an amenable number.

1213220716 is a deficient number, since it is larger than the sum of its proper divisors (910338372).

1213220716 is a wasteful number, since it uses less digits than its factorization.

1213220716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60408 (or 60406 counting only the distinct ones).

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

The square root of 1213220716 is about 34831.3180342059. The cubic root of 1213220716 is about 1066.5468542944.

Adding to 1213220716 its reverse (6170223121), we get a palindrome (7383443837).

The spelling of 1213220716 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, seven hundred sixteen".