1301220221 has 4 divisors (see below), whose sum is σ = 1487108832. Its totient is φ = 1115331612.

The previous prime is 1301220209. The next prime is 1301220241. The reversal of 1301220221 is 1220221031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1220221031 = 467 ⋅2612893.

It is a cyclic number.

It is not a de Polignac number, because 1301220221 - 2¹⁰ = 1301219197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1301220196 and 1301220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301220241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92944295 + ... + 92944308.

It is an arithmetic number, because the mean of its divisors is an integer number (371777208).

Almost surely, 2^1301220221 is an apocalyptic number.

It is an amenable number.

1301220221 is a deficient number, since it is larger than the sum of its proper divisors (185888611).

1301220221 is an equidigital number, since it uses as much as digits as its factorization.

1301220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185888610.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1301220221 is about 36072.4302064610. The cubic root of 1301220221 is about 1091.7342482050.

Adding to 1301220221 its reverse (1220221031), we get a palindrome (2521441252).

It can be divided in two parts, 13012 and 20221, that added together give a palindrome (33233).

The spelling of 1301220221 in words is "one billion, three hundred one million, two hundred twenty thousand, two hundred twenty-one".