1210223221 has 4 divisors (see below), whose sum is σ = 1273919200. Its totient is φ = 1146527244.

The previous prime is 1210223197. The next prime is 1210223233. The reversal of 1210223221 is 1223220121.

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: 1223220121 = 79 ⋅15483799.

It is a cyclic number.

It is not a de Polignac number, because 1210223221 - 2¹³ = 1210215029 is a prime.

It is a super-2 number, since 2×1210223221² = 2929280489295229682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210223195 and 1210223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210223921) 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, 31847961 + ... + 31847998.

It is an arithmetic number, because the mean of its divisors is an integer number (318479800).

Almost surely, 2^1210223221 is an apocalyptic number.

It is an amenable number.

1210223221 is a deficient number, since it is larger than the sum of its proper divisors (63695979).

1210223221 is an equidigital number, since it uses as much as digits as its factorization.

1210223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63695978.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1210223221 is about 34788.2626901661. The cubic root of 1210223221 is about 1065.6677602298.

Adding to 1210223221 its reverse (1223220121), we get a palindrome (2433443342).

The spelling of 1210223221 in words is "one billion, two hundred ten million, two hundred twenty-three thousand, two hundred twenty-one".