1221200111102 has 8 divisors (see below), whose sum is σ = 1928210701800. Its totient is φ = 578463210504.

The previous prime is 1221200111093. The next prime is 1221200111119. The reversal of 1221200111102 is 2011110021221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221200111102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16068422477 + ... + 16068422552.

It is an arithmetic number, because the mean of its divisors is an integer number (241026337725).

Almost surely, 2^{1221200111102} is an apocalyptic number.

1221200111102 is a deficient number, since it is larger than the sum of its proper divisors (707010590698).

1221200111102 is a wasteful number, since it uses less digits than its factorization.

1221200111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32136845050.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221200111102 its reverse (2011110021221), we get a palindrome (3232310132323).

The spelling of 1221200111102 in words is "one trillion, two hundred twenty-one billion, two hundred million, one hundred eleven thousand, one hundred two".