1221210211103 has 8 divisors (see below), whose sum is σ = 1285557580800. Its totient is φ = 1156870156248.

The previous prime is 1221210211099. The next prime is 1221210211213. The reversal of 1221210211103 is 3011120121221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1221210211103 - 2² = 1221210211099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210211303) 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, 1484351 + ... + 2155392.

It is an arithmetic number, because the mean of its divisors is an integer number (160694697600).

Almost surely, 2^{1221210211103} is an apocalyptic number.

1221210211103 is a deficient number, since it is larger than the sum of its proper divisors (64347369697).

1221210211103 is a wasteful number, since it uses less digits than its factorization.

1221210211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657421.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221210211103 its reverse (3011120121221), we get a palindrome (4232330332324).

The spelling of 1221210211103 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, one hundred three".