1220210401 has 4 divisors (see below), whose sum is σ = 1222289712. Its totient is φ = 1218131092.

The previous prime is 1220210357. The next prime is 1220210413. The reversal of 1220210401 is 1040120221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220210401 - 2⁹ = 1220209889 is a prime.

It is a super-3 number, since 3×1220210401³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220210461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1038775 + ... + 1039948.

It is an arithmetic number, because the mean of its divisors is an integer number (305572428).

Almost surely, 2^1220210401 is an apocalyptic number.

It is an amenable number.

1220210401 is a deficient number, since it is larger than the sum of its proper divisors (2079311).

1220210401 is an equidigital number, since it uses as much as digits as its factorization.

1220210401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079310.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220210401 is about 34931.5101448535. The cubic root of 1220210401 is about 1068.5911527721.

Adding to 1220210401 its reverse (1040120221), we get a palindrome (2260330622).

The spelling of 1220210401 in words is "one billion, two hundred twenty million, two hundred ten thousand, four hundred one".