1220414021 has 2 divisors, whose sum is σ = 1220414022. Its totient is φ = 1220414020.

The previous prime is 1220413991. The next prime is 1220414029. The reversal of 1220414021 is 1204140221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869601121 + 350812900 = 29489^2 + 18730^2 .

It is an emirp because it is prime and its reverse (1204140221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220414021 - 2²⁶ = 1153305157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220414029) 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 as a sum of consecutive naturals, namely, 610207010 + 610207011.

It is an arithmetic number, because the mean of its divisors is an integer number (610207011).

Almost surely, 2^1220414021 is an apocalyptic number.

It is an amenable number.

1220414021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220414021 is an equidigital number, since it uses as much as digits as its factorization.

1220414021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1220414021 is about 34934.4245837827. The cubic root of 1220414021 is about 1068.6505890869.

Adding to 1220414021 its reverse (1204140221), we get a palindrome (2424554242).

It can be divided in two parts, 1 and 220414021, that added together give a palindrome (220414022).

The spelling of 1220414021 in words is "one billion, two hundred twenty million, four hundred fourteen thousand, twenty-one".