1321102212 has 12 divisors (see below), whose sum is σ = 3082571856. Its totient is φ = 440367400.

The previous prime is 1321102207. The next prime is 1321102213. The reversal of 1321102212 is 2122011231.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1321102212² = 3490622109102585888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321102191 and 1321102200.

It is not an unprimeable number, because it can be changed into a prime (1321102213) 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 3 ways as a sum of consecutive naturals, for example, 55045914 + ... + 55045937.

It is an arithmetic number, because the mean of its divisors is an integer number (256880988).

Almost surely, 2^1321102212 is an apocalyptic number.

1321102212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321102212 is an abundant number, since it is smaller than the sum of its proper divisors (1761469644).

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

1321102212 is a wasteful number, since it uses less digits than its factorization.

1321102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110091858 (or 110091856 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1321102212 is about 36346.9697774106. The cubic root of 1321102212 is about 1097.2665497653.

Adding to 1321102212 its reverse (2122011231), we get a palindrome (3443113443).

The spelling of 1321102212 in words is "one billion, three hundred twenty-one million, one hundred two thousand, two hundred twelve".