1230020011 has 4 divisors (see below), whose sum is σ = 1341840024. Its totient is φ = 1118200000.

The previous prime is 1230020009. The next prime is 1230020027. The reversal of 1230020011 is 1100200321.

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

It is a cyclic number.

It is not a de Polignac number, because 1230020011 - 2¹ = 1230020009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230020011.

It is not an unprimeable number, because it can be changed into a prime (1230021011) 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, 55909990 + ... + 55910011.

It is an arithmetic number, because the mean of its divisors is an integer number (335460006).

Almost surely, 2^1230020011 is an apocalyptic number.

1230020011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1230020011 is a deficient number, since it is larger than the sum of its proper divisors (111820013).

1230020011 is a wasteful number, since it uses less digits than its factorization.

1230020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111820012.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1230020011 is about 35071.6411221374. The cubic root of 1230020011 is about 1071.4470801230.

Adding to 1230020011 its reverse (1100200321), we get a palindrome (2330220332).

The spelling of 1230020011 in words is "one billion, two hundred thirty million, twenty thousand, eleven".