1331011222 has 4 divisors (see below), whose sum is σ = 1996516836. Its totient is φ = 665505610.

The previous prime is 1331011169. The next prime is 1331011223. The reversal of 1331011222 is 2221101331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2221101331 = 83 ⋅26760257.

It is a junction number, because it is equal to n+sod(n) for n = 1331011196 and 1331011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331011223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332752804 + ... + 332752807.

It is an arithmetic number, because the mean of its divisors is an integer number (499129209).

Almost surely, 2^1331011222 is an apocalyptic number.

1331011222 is a deficient number, since it is larger than the sum of its proper divisors (665505614).

1331011222 is an equidigital number, since it uses as much as digits as its factorization.

1331011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665505613.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1331011222 is about 36483.0264917811. The cubic root of 1331011222 is about 1100.0030914514.

Adding to 1331011222 its reverse (2221101331), we get a palindrome (3552112553).

The spelling of 1331011222 in words is "one billion, three hundred thirty-one million, eleven thousand, two hundred twenty-two".