121121220102211 has 20 divisors (see below), whose sum is σ = 141304607651792. Its totient is φ = 103814569915056.

The previous prime is 121121220102191. The next prime is 121121220102227. The reversal of 121121220102211 is 112201022121121.

It is a happy number.

It is not a de Polignac number, because 121121220102211 - 2⁷ = 121121220102083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121220102251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69179770 + ... + 70908976.

Almost surely, 2^{121121220102211} is an apocalyptic number.

121121220102211 is a deficient number, since it is larger than the sum of its proper divisors (20183387549581).

121121220102211 is an frugal number, since it uses more digits than its factorization.

121121220102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758408 (or 1758387 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121220102211 its reverse (112201022121121), we get a palindrome (233322242223332).

The spelling of 121121220102211 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred eleven".