1243221011222 has 4 divisors (see below), whose sum is σ = 1864831516836. Its totient is φ = 621610505610.

The previous prime is 1243221011213. The next prime is 1243221011251. The reversal of 1243221011222 is 2221101223421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310805252804 + ... + 310805252807.

It is an arithmetic number, because the mean of its divisors is an integer number (466207879209).

Almost surely, 2^{1243221011222} is an apocalyptic number.

1243221011222 is a deficient number, since it is larger than the sum of its proper divisors (621610505614).

1243221011222 is an equidigital number, since it uses as much as digits as its factorization.

1243221011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621610505613.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1243221011222 its reverse (2221101223421), we get a palindrome (3464322234643).

The spelling of 1243221011222 in words is "one trillion, two hundred forty-three billion, two hundred twenty-one million, eleven thousand, two hundred twenty-two".