121010211211 has 4 divisors (see below), whose sum is σ = 123061231800. Its totient is φ = 118959190624.

The previous prime is 121010211191. The next prime is 121010211233. The reversal of 121010211211 is 112112010121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112112010121 = 1741 ⋅64395181.

It is a cyclic number.

It is not a de Polignac number, because 121010211211 - 2¹³ = 121010203019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010211191 and 121010211200.

It is not an unprimeable number, because it can be changed into a prime (121010211911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025510206 + ... + 1025510323.

It is an arithmetic number, because the mean of its divisors is an integer number (30765307950).

Almost surely, 2^121010211211 is an apocalyptic number.

121010211211 is a deficient number, since it is larger than the sum of its proper divisors (2051020589).

121010211211 is an equidigital number, since it uses as much as digits as its factorization.

121010211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051020588.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121010211211 its reverse (112112010121), we get a palindrome (233122221332).

The spelling of 121010211211 in words is "one hundred twenty-one billion, ten million, two hundred eleven thousand, two hundred eleven".