1221010122113 has 4 divisors (see below), whose sum is σ = 1221017973168. Its totient is φ = 1221002271060.

The previous prime is 1221010122067. The next prime is 1221010122121. The reversal of 1221010122113 is 3112210101221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1221010122113 - 2²⁸ = 1220741686657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221010122091 and 1221010122100.

It is not an unprimeable number, because it can be changed into a prime (1221010122133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687431 + ... + 4004892.

It is an arithmetic number, because the mean of its divisors is an integer number (305254493292).

Almost surely, 2^{1221010122113} is an apocalyptic number.

It is an amenable number.

1221010122113 is a deficient number, since it is larger than the sum of its proper divisors (7851055).

1221010122113 is an equidigital number, since it uses as much as digits as its factorization.

1221010122113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851054.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221010122113 its reverse (3112210101221), we get a palindrome (4333220223334).

The spelling of 1221010122113 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred twenty-two thousand, one hundred thirteen".