1023120231111 has 16 divisors (see below), whose sum is σ = 1653527646720. Its totient is φ = 620072867160.

The previous prime is 1023120231103. The next prime is 1023120231131. The reversal of 1023120231111 is 1111320213201.

1023120231111 is a `hidden beast` number, since 10 + 2 + 312 + 0 + 231 + 111 = 666.

It is not a de Polignac number, because 1023120231111 - 2³ = 1023120231103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023120231131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1722424335 + ... + 1722424928.

It is an arithmetic number, because the mean of its divisors is an integer number (103345477920).

Almost surely, 2^{1023120231111} is an apocalyptic number.

1023120231111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1023120231111 is a deficient number, since it is larger than the sum of its proper divisors (630407415609).

1023120231111 is a wasteful number, since it uses less digits than its factorization.

1023120231111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444849283 (or 3444849277 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1023120231111 its reverse (1111320213201), we get a palindrome (2134440444312).

The spelling of 1023120231111 in words is "one trillion, twenty-three billion, one hundred twenty million, two hundred thirty-one thousand, one hundred eleven".