1220000011 has 4 divisors (see below), whose sum is σ = 1220345224. Its totient is φ = 1219654800.

The previous prime is 1219999993. The next prime is 1220000027. The reversal of 1220000011 is 1100000221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100000221 = 251 ⋅4382471.

It is a cyclic number.

It is not a de Polignac number, because 1220000011 - 2²⁹ = 683129099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1219999949 and 1220000003.

It is not an unprimeable number, because it can be changed into a prime (1220000611) 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, 167250 + ... + 174391.

It is an arithmetic number, because the mean of its divisors is an integer number (305086306).

Almost surely, 2^1220000011 is an apocalyptic number.

1220000011 is a deficient number, since it is larger than the sum of its proper divisors (345213).

1220000011 is an equidigital number, since it uses as much as digits as its factorization.

1220000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345212.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1220000011 is about 34928.4985506105. The cubic root of 1220000011 is about 1068.5297333603.

Adding to 1220000011 its reverse (1100000221), we get a palindrome (2320000232).

The spelling of 1220000011 in words is "one billion, two hundred twenty million, eleven", and thus it is an aban number.