1213071822 has 32 divisors (see below), whose sum is σ = 2854288800. Its totient is φ = 380571264.

The previous prime is 1213071817. The next prime is 1213071863. The reversal of 1213071822 is 2281703121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659797 + ... + 661632.

It is an arithmetic number, because the mean of its divisors is an integer number (89196525).

Almost surely, 2^1213071822 is an apocalyptic number.

1213071822 is an abundant number, since it is smaller than the sum of its proper divisors (1641216978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213071822 is a wasteful number, since it uses less digits than its factorization.

1213071822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321457 (or 1321451 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1213071822 is about 34829.1806105168. The cubic root of 1213071822 is about 1066.5032214193.

Adding to 1213071822 its reverse (2281703121), we get a palindrome (3494774943).

The spelling of 1213071822 in words is "one billion, two hundred thirteen million, seventy-one thousand, eight hundred twenty-two".