10123120111 has 24 divisors (see below), whose sum is σ = 11556669600. Its totient is φ = 8845664256.

The previous prime is 10123120081. The next prime is 10123120121. The reversal of 10123120111 is 11102132101.

It is a happy number.

It is not a de Polignac number, because 10123120111 - 2⁵ = 10123120079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10123120091 and 10123120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10123120121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363615 + ... + 390463.

It is an arithmetic number, because the mean of its divisors is an integer number (481527900).

Almost surely, 2^10123120111 is an apocalyptic number.

10123120111 is a deficient number, since it is larger than the sum of its proper divisors (1433549489).

10123120111 is a wasteful number, since it uses less digits than its factorization.

10123120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26995 (or 26982 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10123120111 its reverse (11102132101), we get a palindrome (21225252212).

The spelling of 10123120111 in words is "ten billion, one hundred twenty-three million, one hundred twenty thousand, one hundred eleven".