1143020123421 has 24 divisors (see below), whose sum is σ = 1675324966560. Its totient is φ = 692675380320.

The previous prime is 1143020123389. The next prime is 1143020123423. The reversal of 1143020123421 is 1243210203411.

It is not a de Polignac number, because 1143020123421 - 2⁵ = 1143020123389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143020123391 and 1143020123400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143020123423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3941175 + ... + 4221243.

It is an arithmetic number, because the mean of its divisors is an integer number (69805206940).

Almost surely, 2^{1143020123421} is an apocalyptic number.

1143020123421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143020123421 is a deficient number, since it is larger than the sum of its proper divisors (532304843139).

1143020123421 is a wasteful number, since it uses less digits than its factorization.

1143020123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291337 (or 291326 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1143020123421 its reverse (1243210203411), we get a palindrome (2386230326832).

The spelling of 1143020123421 in words is "one trillion, one hundred forty-three billion, twenty million, one hundred twenty-three thousand, four hundred twenty-one".