1220021102111 has 12 divisors (see below), whose sum is σ = 1502691058368. Its totient is φ = 984218703552.

The previous prime is 1220021102071. The next prime is 1220021102123. The reversal of 1220021102111 is 1112011200221.

It is a de Polignac number, because none of the positive numbers 2^k-1220021102111 is a prime.

It is a super-2 number, since 2×1220021102111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021105111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 732304751 + ... + 732306416.

It is an arithmetic number, because the mean of its divisors is an integer number (125224254864).

Almost surely, 2^{1220021102111} is an apocalyptic number.

1220021102111 is a deficient number, since it is larger than the sum of its proper divisors (282669956257).

1220021102111 is a wasteful number, since it uses less digits than its factorization.

1220021102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464611198 (or 1464611191 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220021102111 its reverse (1112011200221), we get a palindrome (2332032302332).

The spelling of 1220021102111 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred two thousand, one hundred eleven".