1221013514 has 16 divisors (see below), whose sum is σ = 2097757248. Its totient is φ = 522143712.

The previous prime is 1221013513. The next prime is 1221013529. The reversal of 1221013514 is 4153101221.

It is not an unprimeable number, because it can be changed into a prime (1221013513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89024 + ... + 101819.

It is an arithmetic number, because the mean of its divisors is an integer number (131109828).

Almost surely, 2^1221013514 is an apocalyptic number.

1221013514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221013514 is a deficient number, since it is larger than the sum of its proper divisors (876743734).

1221013514 is a wasteful number, since it uses less digits than its factorization.

1221013514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191309.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1221013514 is about 34943.0037918894. The cubic root of 1221013514 is about 1068.8255416481.

Adding to 1221013514 its reverse (4153101221), we get a palindrome (5374114735).

The spelling of 1221013514 in words is "one billion, two hundred twenty-one million, thirteen thousand, five hundred fourteen".