121335020211 has 4 divisors (see below), whose sum is σ = 161780026952. Its totient is φ = 80890013472.

The previous prime is 121335020189. The next prime is 121335020231. The reversal of 121335020211 is 112020533121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121335020211 - 2¹⁸ = 121334758067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121335020231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20222503366 + ... + 20222503371.

It is an arithmetic number, because the mean of its divisors is an integer number (40445006738).

Almost surely, 2^121335020211 is an apocalyptic number.

121335020211 is a deficient number, since it is larger than the sum of its proper divisors (40445006741).

121335020211 is an equidigital number, since it uses as much as digits as its factorization.

121335020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40445006740.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 121335020211 its reverse (112020533121), we get a palindrome (233355553332).

The spelling of 121335020211 in words is "one hundred twenty-one billion, three hundred thirty-five million, twenty thousand, two hundred eleven".