10123121211 has 16 divisors (see below), whose sum is σ = 15716761344. Its totient is φ = 5675495904.

The previous prime is 10123121209. The next prime is 10123121233. The reversal of 10123121211 is 11212132101.

10123121211 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10123121211 - 2¹ = 10123121209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10123121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4546561 + ... + 4548786.

It is an arithmetic number, because the mean of its divisors is an integer number (982297584).

Almost surely, 2^10123121211 is an apocalyptic number.

10123121211 is a deficient number, since it is larger than the sum of its proper divisors (5593640133).

10123121211 is an equidigital number, since it uses as much as digits as its factorization.

10123121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9095410.

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

Adding to 10123121211 its reverse (11212132101), we get a palindrome (21335253312).

The spelling of 10123121211 in words is "ten billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred eleven".