1220102221 has 8 divisors (see below), whose sum is σ = 1314260640. Its totient is φ = 1125987312.

The previous prime is 1220102209. The next prime is 1220102237. The reversal of 1220102221 is 1222010221.

It is a happy number.

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 1220102221 - 2²⁷ = 1085884493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220102921) 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, 69306 + ... + 85108.

It is an arithmetic number, because the mean of its divisors is an integer number (164282580).

Almost surely, 2^1220102221 is an apocalyptic number.

It is an amenable number.

1220102221 is a deficient number, since it is larger than the sum of its proper divisors (94158419).

1220102221 is a wasteful number, since it uses less digits than its factorization.

1220102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21755.

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

The square root of 1220102221 is about 34929.9616518541. The cubic root of 1220102221 is about 1068.5595725333.

Adding to 1220102221 its reverse (1222010221), we get a palindrome (2442112442).

The spelling of 1220102221 in words is "one billion, two hundred twenty million, one hundred two thousand, two hundred twenty-one".