1221220102113 has 48 divisors (see below), whose sum is σ = 1971691824960. Its totient is φ = 721969113600.

The previous prime is 1221220102093. The next prime is 1221220102127. The reversal of 1221220102113 is 3112010221221.

1221220102113 is a `hidden beast` number, since 1 + 221 + 220 + 10 + 211 + 3 = 666.

It is not a de Polignac number, because 1221220102113 - 2⁶ = 1221220102049 is a prime.

It is a super-2 number, since 2×1221220102113² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221220102153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3051093 + ... + 3428061.

It is an arithmetic number, because the mean of its divisors is an integer number (41076913020).

Almost surely, 2^{1221220102113} is an apocalyptic number.

It is an amenable number.

1221220102113 is a deficient number, since it is larger than the sum of its proper divisors (750471722847).

1221220102113 is a wasteful number, since it uses less digits than its factorization.

1221220102113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377790 (or 377787 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1221220102113 its reverse (3112010221221), we get a palindrome (4333230323334).

The spelling of 1221220102113 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, one hundred thirteen".