1220210015 has 4 divisors (see below), whose sum is σ = 1464252024. Its totient is φ = 976168008.

The previous prime is 1220210009. The next prime is 1220210029. The reversal of 1220210015 is 5100120221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220210015 - 2⁴ = 1220209999 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122020997 + ... + 122021006.

It is an arithmetic number, because the mean of its divisors is an integer number (366063006).

Almost surely, 2^1220210015 is an apocalyptic number.

1220210015 is a deficient number, since it is larger than the sum of its proper divisors (244042009).

1220210015 is an equidigital number, since it uses as much as digits as its factorization.

1220210015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244042008.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1220210015 is about 34931.5046197555. The cubic root of 1220210015 is about 1068.5910400931.

Adding to 1220210015 its reverse (5100120221), we get a palindrome (6320330236).

The spelling of 1220210015 in words is "one billion, two hundred twenty million, two hundred ten thousand, fifteen".