10123121311 has 4 divisors (see below), whose sum is σ = 10245086712. Its totient is φ = 10001155912.

The previous prime is 10123121279. The next prime is 10123121413. The reversal of 10123121311 is 11312132101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312132101 = 41 ⋅275905661.

It is a cyclic number.

It is not a de Polignac number, because 10123121311 - 2⁵ = 10123121279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123121111) 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, 60982576 + ... + 60982741.

It is an arithmetic number, because the mean of its divisors is an integer number (2561271678).

Almost surely, 2^10123121311 is an apocalyptic number.

10123121311 is a deficient number, since it is larger than the sum of its proper divisors (121965401).

10123121311 is an equidigital number, since it uses as much as digits as its factorization.

10123121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121965400.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 10123121311 its reverse (11312132101), we get a palindrome (21435253412).

It can be divided in two parts, 10 and 123121311, that added together give a palindrome (123121321).

The spelling of 10123121311 in words is "ten billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred eleven".