1220222203221 has 32 divisors (see below), whose sum is σ = 1878511697920. Its totient is φ = 690105515904.

The previous prime is 1220222203219. The next prime is 1220222203223. The reversal of 1220222203221 is 1223022220221.

It is an interprime number because it is at equal distance from previous prime (1220222203219) and next prime (1220222203223).

It is not a de Polignac number, because 1220222203221 - 2¹ = 1220222203219 is a prime.

It is a super-2 number, since 2×1220222203221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222203223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3644361 + ... + 3965073.

It is an arithmetic number, because the mean of its divisors is an integer number (58703490560).

Almost surely, 2^{1220222203221} is an apocalyptic number.

It is an amenable number.

1220222203221 is a deficient number, since it is larger than the sum of its proper divisors (658289494699).

1220222203221 is a wasteful number, since it uses less digits than its factorization.

1220222203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322585.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1220222203221 its reverse (1223022220221), we get a palindrome (2443244423442).

The spelling of 1220222203221 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred three thousand, two hundred twenty-one".