1231222121330 has 16 divisors (see below), whose sum is σ = 2219282167680. Its totient is φ = 491803882032.

The previous prime is 1231222121323. The next prime is 1231222121419. The reversal of 1231222121330 is 331212221321.

It is a junction number, because it is equal to n+sod(n) for n = 1231222121296 and 1231222121305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85613264 + ... + 85627643.

It is an arithmetic number, because the mean of its divisors is an integer number (138705135480).

Almost surely, 2^{1231222121330} is an apocalyptic number.

1231222121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231222121330 is a deficient number, since it is larger than the sum of its proper divisors (988060046350).

1231222121330 is a wasteful number, since it uses less digits than its factorization.

1231222121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171241633.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1231222121330 its reverse (331212221321), we get a palindrome (1562434342651).

Subtracting from 1231222121330 its reverse (331212221321), we obtain a palindrome (900009900009).

The spelling of 1231222121330 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, three hundred thirty".