1221103111302 has 48 divisors (see below), whose sum is σ = 2737479888000. Its totient is φ = 392923370112.

The previous prime is 1221103111279. The next prime is 1221103111387. The reversal of 1221103111302 is 2031113011221.

1221103111302 is a `hidden beast` number, since 1 + 221 + 1 + 0 + 311 + 130 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2534074 + ... + 2977202.

It is an arithmetic number, because the mean of its divisors is an integer number (57030831000).

Almost surely, 2^{1221103111302} is an apocalyptic number.

1221103111302 is an abundant number, since it is smaller than the sum of its proper divisors (1516376776698).

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

1221103111302 is a wasteful number, since it uses less digits than its factorization.

1221103111302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448445 (or 448442 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1221103111302 its reverse (2031113011221), we get a palindrome (3252216122523).

The spelling of 1221103111302 in words is "one trillion, two hundred twenty-one billion, one hundred three million, one hundred eleven thousand, three hundred two".