1221315214 has 8 divisors (see below), whose sum is σ = 2093683248. Its totient is φ = 523420800.

The previous prime is 1221315209. The next prime is 1221315217. The reversal of 1221315214 is 4125131221.

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

It is a super-2 number, since 2×1221315214² = 2983221703895731592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221315217) 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, 43618387 + ... + 43618414.

It is an arithmetic number, because the mean of its divisors is an integer number (261710406).

Almost surely, 2^1221315214 is an apocalyptic number.

1221315214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221315214 is a deficient number, since it is larger than the sum of its proper divisors (872368034).

1221315214 is an equidigital number, since it uses as much as digits as its factorization.

1221315214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87236810.

The product of its digits is 480, while the sum is 22.

The square root of 1221315214 is about 34947.3205553731. The cubic root of 1221315214 is about 1068.9135663660.

Adding to 1221315214 its reverse (4125131221), we get a palindrome (5346446435).

The spelling of 1221315214 in words is "one billion, two hundred twenty-one million, three hundred fifteen thousand, two hundred fourteen".