1221514015 has 8 divisors (see below), whose sum is σ = 1529548128. Its totient is φ = 934723680.

The previous prime is 1221513991. The next prime is 1221514027. The reversal of 1221514015 is 5104151221.

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

It is not a de Polignac number, because 1221514015 - 2¹⁹ = 1220989727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5310816 + ... + 5311045.

It is an arithmetic number, because the mean of its divisors is an integer number (191193516).

Almost surely, 2^1221514015 is an apocalyptic number.

1221514015 is a deficient number, since it is larger than the sum of its proper divisors (308034113).

1221514015 is a wasteful number, since it uses less digits than its factorization.

1221514015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621889.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1221514015 is about 34950.1647349480. The cubic root of 1221514015 is about 1068.9715611011.

Adding to 1221514015 its reverse (5104151221), we get a palindrome (6325665236).

The spelling of 1221514015 in words is "one billion, two hundred twenty-one million, five hundred fourteen thousand, fifteen".