1023121111000 has 32 divisors (see below), whose sum is σ = 2394103402080. Its totient is φ = 409248444000.

The previous prime is 1023121110997. The next prime is 1023121111007. The reversal of 1023121111000 is 1111213201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023121111007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511559556 + ... + 511561555.

It is an arithmetic number, because the mean of its divisors is an integer number (74815731315).

Almost surely, 2^{1023121111000} is an apocalyptic number.

1023121111000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023121111000 is an abundant number, since it is smaller than the sum of its proper divisors (1370982291080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023121111000 is a wasteful number, since it uses less digits than its factorization.

1023121111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023121132 (or 1023121118 counting only the distinct ones).

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

Adding to 1023121111000 its reverse (1111213201), we get a palindrome (1024232324201).

The spelling of 1023121111000 in words is "one trillion, twenty-three billion, one hundred twenty-one million, one hundred eleven thousand".