1221232022 has 4 divisors (see below), whose sum is σ = 1831848036. Its totient is φ = 610616010.

The previous prime is 1221231997. The next prime is 1221232031. The reversal of 1221232022 is 2202321221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2202321221 = 25153 ⋅87557.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 305308004 + ... + 305308007.

It is an arithmetic number, because the mean of its divisors is an integer number (457962009).

Almost surely, 2^1221232022 is an apocalyptic number.

1221232022 is a deficient number, since it is larger than the sum of its proper divisors (610616014).

1221232022 is an equidigital number, since it uses as much as digits as its factorization.

1221232022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610616013.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1221232022 is about 34946.1302864852. The cubic root of 1221232022 is about 1068.8892955156.

Adding to 1221232022 its reverse (2202321221), we get a palindrome (3423553243).

The spelling of 1221232022 in words is "one billion, two hundred twenty-one million, two hundred thirty-two thousand, twenty-two".