1211000013423 has 8 divisors (see below), whose sum is σ = 1794074094000. Its totient is φ = 807333342264.

The previous prime is 1211000013403. The next prime is 1211000013427. The reversal of 1211000013423 is 3243100001121.

It is not a de Polignac number, because 1211000013423 - 2¹⁶ = 1210999947887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211000013396 and 1211000013405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211000013427) 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, 22425926148 + ... + 22425926201.

It is an arithmetic number, because the mean of its divisors is an integer number (224259261750).

Almost surely, 2^{1211000013423} is an apocalyptic number.

1211000013423 is a deficient number, since it is larger than the sum of its proper divisors (583074080577).

1211000013423 is an equidigital number, since it uses as much as digits as its factorization.

1211000013423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44851852358 (or 44851852352 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1211000013423 its reverse (3243100001121), we get a palindrome (4454100014544).

The spelling of 1211000013423 in words is "one trillion, two hundred eleven billion, thirteen thousand, four hundred twenty-three".