11111020212123 has 24 divisors (see below), whose sum is σ = 17541776533008. Its totient is φ = 6735497896512.

The previous prime is 11111020212067. The next prime is 11111020212157. The reversal of 11111020212123 is 32121202011111.

It is a happy number.

It is not a de Polignac number, because 11111020212123 - 2¹⁸ = 11111019949979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111020212096 and 11111020212105.

It is not an unprimeable number, because it can be changed into a prime (11111020210123) 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, 708693540 + ... + 708709217.

It is an arithmetic number, because the mean of its divisors is an integer number (730907355542).

Almost surely, 2^{11111020212123} is an apocalyptic number.

11111020212123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11111020212123 is a deficient number, since it is larger than the sum of its proper divisors (6430756320885).

11111020212123 is a wasteful number, since it uses less digits than its factorization.

11111020212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417402843 (or 1417402840 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11111020212123 its reverse (32121202011111), we get a palindrome (43232222223234).

The spelling of 11111020212123 in words is "eleven trillion, one hundred eleven billion, twenty million, two hundred twelve thousand, one hundred twenty-three".