123021221211 has 12 divisors (see below), whose sum is σ = 203082650992. Its totient is φ = 70297840656.

The previous prime is 123021221209. The next prime is 123021221237. The reversal of 123021221211 is 112122120321.

123021221211 is a `hidden beast` number, since 1 + 230 + 2 + 1 + 221 + 211 = 666.

It is not a de Polignac number, because 123021221211 - 2¹ = 123021221209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123021221311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 976358836 + ... + 976358961.

Almost surely, 2^123021221211 is an apocalyptic number.

123021221211 is a deficient number, since it is larger than the sum of its proper divisors (80061429781).

123021221211 is a wasteful number, since it uses less digits than its factorization.

123021221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952717810 (or 1952717807 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 123021221211 its reverse (112122120321), we get a palindrome (235143341532).

The spelling of 123021221211 in words is "one hundred twenty-three billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".