1102121220221 has 16 divisors (see below), whose sum is σ = 1333717000704. Its totient is φ = 889067721984.

The previous prime is 1102121220173. The next prime is 1102121220223. The reversal of 1102121220221 is 1220221212011.

It is a cyclic number.

It is not a de Polignac number, because 1102121220221 - 2¹⁰ = 1102121219197 is a prime.

It is a super-2 number, since 2×1102121220221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1102121220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102121220223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2742071 + ... + 3118203.

It is an arithmetic number, because the mean of its divisors is an integer number (83357312544).

Almost surely, 2^{1102121220221} is an apocalyptic number.

It is an amenable number.

1102121220221 is a deficient number, since it is larger than the sum of its proper divisors (231595780483).

1102121220221 is a wasteful number, since it uses less digits than its factorization.

1102121220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400780.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1102121220221 its reverse (1220221212011), we get a palindrome (2322342432232).

The spelling of 1102121220221 in words is "one trillion, one hundred two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".