1212221110113 has 36 divisors (see below), whose sum is σ = 1897738244220. Its totient is φ = 745313332608.

The previous prime is 1212221110103. The next prime is 1212221110129. The reversal of 1212221110113 is 3110111222121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 331789824144 + 880431285969 = 576012^2 + 938313^2 .

It is not a de Polignac number, because 1212221110113 - 2⁵ = 1212221110081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212221110103) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1342203 + ... + 2055711.

Almost surely, 2^{1212221110113} is an apocalyptic number.

1212221110113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212221110113 is a deficient number, since it is larger than the sum of its proper divisors (685517134107).

1212221110113 is a wasteful number, since it uses less digits than its factorization.

1212221110113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714658 (or 714642 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1212221110113 its reverse (3110111222121), we get a palindrome (4322332332234).

The spelling of 1212221110113 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, one hundred thirteen".