1221552103066 has 16 divisors (see below), whose sum is σ = 1875780063360. Its totient is φ = 596354112640.

The previous prime is 1221552103027. The next prime is 1221552103067. The reversal of 1221552103066 is 6603012551221.

It is not an unprimeable number, because it can be changed into a prime (1221552103067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15468055 + ... + 15546826.

It is an arithmetic number, because the mean of its divisors is an integer number (117236253960).

Almost surely, 2^{1221552103066} is an apocalyptic number.

1221552103066 is a deficient number, since it is larger than the sum of its proper divisors (654227960294).

1221552103066 is a wasteful number, since it uses less digits than its factorization.

1221552103066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31015349.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 1221552103066 its reverse (6603012551221), we get a palindrome (7824564654287).

The spelling of 1221552103066 in words is "one trillion, two hundred twenty-one billion, five hundred fifty-two million, one hundred three thousand, sixty-six".