123012220211 has 16 divisors (see below), whose sum is σ = 128216135520. Its totient is φ = 117945434880.

The previous prime is 123012220189. The next prime is 123012220217. The reversal of 123012220211 is 112022210321.

It is a cyclic number.

It is not a de Polignac number, because 123012220211 - 2²⁶ = 122945111347 is a prime.

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 123012220211.

It is not an unprimeable number, because it can be changed into a prime (123012220217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275876 + ... + 567566.

It is an arithmetic number, because the mean of its divisors is an integer number (8013508470).

Almost surely, 2^123012220211 is an apocalyptic number.

123012220211 is a deficient number, since it is larger than the sum of its proper divisors (5203915309).

123012220211 is a wasteful number, since it uses less digits than its factorization.

123012220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291926.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 123012220211 its reverse (112022210321), we get a palindrome (235034430532).

The spelling of 123012220211 in words is "one hundred twenty-three billion, twelve million, two hundred twenty thousand, two hundred eleven".