1222152111 has 16 divisors (see below), whose sum is σ = 1811377920. Its totient is φ = 814416120.

The previous prime is 1222152109. The next prime is 1222152119. The reversal of 1222152111 is 1112512221.

1222152111 is a `hidden beast` number, since 122 + 21 + 521 + 1 + 1 = 666.

It is not a de Polignac number, because 1222152111 - 2¹ = 1222152109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222152119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64006 + ... + 80876.

It is an arithmetic number, because the mean of its divisors is an integer number (113211120).

Almost surely, 2^1222152111 is an apocalyptic number.

1222152111 is a deficient number, since it is larger than the sum of its proper divisors (589225809).

1222152111 is a wasteful number, since it uses less digits than its factorization.

1222152111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19563 (or 19557 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 1222152111 is about 34959.2921982125. The cubic root of 1222152111 is about 1069.1576655938.

Adding to 1222152111 its reverse (1112512221), we get a palindrome (2334664332).

The spelling of 1222152111 in words is "one billion, two hundred twenty-two million, one hundred fifty-two thousand, one hundred eleven".