1211312231030 has 32 divisors (see below), whose sum is σ = 2388446409888. Its totient is φ = 438649459200.

The previous prime is 1211312230993. The next prime is 1211312231081. The reversal of 1211312231030 is 301322131121.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211312230993 and 1211312231011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22819817 + ... + 22872836.

It is an arithmetic number, because the mean of its divisors is an integer number (74638950309).

Almost surely, 2^{1211312231030} is an apocalyptic number.

1211312231030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211312231030 is a deficient number, since it is larger than the sum of its proper divisors (1177134178858).

1211312231030 is a wasteful number, since it uses less digits than its factorization.

1211312231030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45692912.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211312231030 its reverse (301322131121), we get a palindrome (1512634362151).

Subtracting from 1211312231030 its reverse (301322131121), we obtain a palindrome (909990099909).

The spelling of 1211312231030 in words is "one trillion, two hundred eleven billion, three hundred twelve million, two hundred thirty-one thousand, thirty".