1220021112113 has 4 divisors (see below), whose sum is σ = 1227791947380. Its totient is φ = 1212250276848.

The previous prime is 1220021112067. The next prime is 1220021112197. The reversal of 1220021112113 is 3112111200221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115235128369 + 1104785983744 = 339463^2 + 1051088^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220021112113 - 2³⁶ = 1151301635377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220021112091 and 1220021112100.

It is not an unprimeable number, because it can be changed into a prime (1220021112313) 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, 3885417398 + ... + 3885417711.

It is an arithmetic number, because the mean of its divisors is an integer number (306947986845).

Almost surely, 2^{1220021112113} is an apocalyptic number.

It is an amenable number.

1220021112113 is a deficient number, since it is larger than the sum of its proper divisors (7770835267).

1220021112113 is an equidigital number, since it uses as much as digits as its factorization.

1220021112113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770835266.

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

Adding to 1220021112113 its reverse (3112111200221), we get a palindrome (4332132312334).

The spelling of 1220021112113 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred twelve thousand, one hundred thirteen".