1221106608 has 60 divisors (see below), whose sum is σ = 3500770728. Its totient is φ = 397105920.

The previous prime is 1221106531. The next prime is 1221106613. The reversal of 1221106608 is 8066011221.

It is a super-2 number, since 2×1221106608² = 2982202696202531328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97510 + ... + 109317.

Almost surely, 2^1221106608 is an apocalyptic number.

1221106608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1221106608 is an abundant number, since it is smaller than the sum of its proper divisors (2279664120).

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

1221106608 is a wasteful number, since it uses less digits than its factorization.

1221106608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206882 (or 206873 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1221106608 is about 34944.3358500344. The cubic root of 1221106608 is about 1068.8527045242.

Adding to 1221106608 its reverse (8066011221), we get a palindrome (9287117829).

The spelling of 1221106608 in words is "one billion, two hundred twenty-one million, one hundred six thousand, six hundred eight".