1231212221122 has 32 divisors (see below), whose sum is σ = 2055863706624. Its totient is φ = 549164404800.

The previous prime is 1231212221089. The next prime is 1231212221171. The reversal of 1231212221122 is 2211222121321.

It is a junction number, because it is equal to n+sod(n) for n = 1231212221093 and 1231212221102.

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, 464629 + ... + 1636552.

It is an arithmetic number, because the mean of its divisors is an integer number (64245740832).

Almost surely, 2^{1231212221122} is an apocalyptic number.

1231212221122 is a deficient number, since it is larger than the sum of its proper divisors (824651485502).

1231212221122 is a wasteful number, since it uses less digits than its factorization.

1231212221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101954.

The product of its digits is 384, while the sum is 22.

Adding to 1231212221122 its reverse (2211222121321), we get a palindrome (3442434342443).

The spelling of 1231212221122 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".