1221002027 has 8 divisors (see below), whose sum is σ = 1399236096. Its totient is φ = 1043719272.

The previous prime is 1221002023. The next prime is 1221002039. The reversal of 1221002027 is 7202001221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221002027 - 2² = 1221002023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221001996 and 1221002014.

It is not an unprimeable number, because it can be changed into a prime (1221002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235073 + ... + 240210.

It is an arithmetic number, because the mean of its divisors is an integer number (174904512).

Almost surely, 2^1221002027 is an apocalyptic number.

1221002027 is a deficient number, since it is larger than the sum of its proper divisors (178234069).

1221002027 is an equidigital number, since it uses as much as digits as its factorization.

1221002027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475657.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1221002027 is about 34942.8394238362. The cubic root of 1221002027 is about 1068.8221898868.

Adding to 1221002027 its reverse (7202001221), we get a palindrome (8423003248).

The spelling of 1221002027 in words is "one billion, two hundred twenty-one million, two thousand, twenty-seven".