123121201011 has 8 divisors (see below), whose sum is σ = 164939619264. Its totient is φ = 81691791720.

The previous prime is 123121200991. The next prime is 123121201019. The reversal of 123121201011 is 110102121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123121201011 - 2³³ = 114531266419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123121201019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97251501 + ... + 97252766.

It is an arithmetic number, because the mean of its divisors is an integer number (20617452408).

Almost surely, 2^123121201011 is an apocalyptic number.

123121201011 is a deficient number, since it is larger than the sum of its proper divisors (41818418253).

123121201011 is a wasteful number, since it uses less digits than its factorization.

123121201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194504481.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 123121201011 its reverse (110102121321), we get a palindrome (233223322332).

The spelling of 123121201011 in words is "one hundred twenty-three billion, one hundred twenty-one million, two hundred one thousand, eleven".