1210020009823 has 2 divisors, whose sum is σ = 1210020009824. Its totient is φ = 1210020009822.

The previous prime is 1210020009811. The next prime is 1210020009839. The reversal of 1210020009823 is 3289000200121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210020009823 - 2⁵ = 1210020009791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210020009791 and 1210020009800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210020009623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605010004911 + 605010004912.

It is an arithmetic number, because the mean of its divisors is an integer number (605010004912).

Almost surely, 2^{1210020009823} is an apocalyptic number.

1210020009823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210020009823 is an equidigital number, since it uses as much as digits as its factorization.

1210020009823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 1210020009823 its reverse (3289000200121), we get a palindrome (4499020209944).

It can be divided in two parts, 12100200098 and 23, that added together give a palindrome (12100200121).

The spelling of 1210020009823 in words is "one trillion, two hundred ten billion, twenty million, nine thousand, eight hundred twenty-three".