1211123423230 has 16 divisors (see below), whose sum is σ = 2491453899360. Its totient is φ = 415242316512.

The previous prime is 1211123423161. The next prime is 1211123423233. The reversal of 1211123423230 is 323243211121.

It is a junction number, because it is equal to n+sod(n) for n = 1211123423195 and 1211123423204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211123423233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8650881525 + ... + 8650881664.

It is an arithmetic number, because the mean of its divisors is an integer number (155715868710).

Almost surely, 2^{1211123423230} is an apocalyptic number.

1211123423230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211123423230 is an abundant number, since it is smaller than the sum of its proper divisors (1280330476130).

1211123423230 is a wasteful number, since it uses less digits than its factorization.

1211123423230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17301763203.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1211123423230 its reverse (323243211121), we get a palindrome (1534366634351).

The spelling of 1211123423230 in words is "one trillion, two hundred eleven billion, one hundred twenty-three million, four hundred twenty-three thousand, two hundred thirty".