123122011 has 4 divisors (see below), whose sum is σ = 124272792. Its totient is φ = 121971232.

The previous prime is 123122009. The next prime is 123122017. The reversal of 123122011 is 110221321.

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

It is a cyclic number.

It is not a de Polignac number, because 123122011 - 2¹ = 123122009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123121982 and 123122000.

It is not an unprimeable number, because it can be changed into a prime (123122017) 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, 575230 + ... + 575443.

It is an arithmetic number, because the mean of its divisors is an integer number (31068198).

Almost surely, 2^123122011 is an apocalyptic number.

123122011 is a deficient number, since it is larger than the sum of its proper divisors (1150781).

123122011 is a wasteful number, since it uses less digits than its factorization.

123122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150780.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123122011 is about 11096.0358236624. The cubic root of 123122011 is about 497.4833690559.

Adding to 123122011 its reverse (110221321), we get a palindrome (233343332).

The spelling of 123122011 in words is "one hundred twenty-three million, one hundred twenty-two thousand, eleven".