1221102122 has 16 divisors (see below), whose sum is σ = 1844006472. Its totient is φ = 606443520.

The previous prime is 1221102067. The next prime is 1221102133. The reversal of 1221102122 is 2212011221.

It can be written as a sum of positive squares in 4 ways, for example, as 451095121 + 770007001 = 21239^2 + 27749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221102097 and 1221102106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291668 + ... + 295824.

Almost surely, 2^1221102122 is an apocalyptic number.

1221102122 is a deficient number, since it is larger than the sum of its proper divisors (622904350).

1221102122 is a wasteful number, since it uses less digits than its factorization.

1221102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1221102122 is about 34944.2716621766. The cubic root of 1221102122 is about 1068.8513956352.

Adding to 1221102122 its reverse (2212011221), we get a palindrome (3433113343).

Subtracting 1221102122 from its reverse (2212011221), we obtain a palindrome (990909099).

The spelling of 1221102122 in words is "one billion, two hundred twenty-one million, one hundred two thousand, one hundred twenty-two".