20120201011 has 4 divisors (see below), whose sum is σ = 20319411024. Its totient is φ = 19920991000.

The previous prime is 20120200973. The next prime is 20120201047. The reversal of 20120201011 is 11010202102.

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 20120201011 - 2¹¹ = 20120198963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120201071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99604855 + ... + 99605056.

It is an arithmetic number, because the mean of its divisors is an integer number (5079852756).

Almost surely, 2^20120201011 is an apocalyptic number.

20120201011 is a deficient number, since it is larger than the sum of its proper divisors (199210013).

20120201011 is a wasteful number, since it uses less digits than its factorization.

20120201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199210012.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20120201011 its reverse (11010202102), we get a palindrome (31130403113).

The spelling of 20120201011 in words is "twenty billion, one hundred twenty million, two hundred one thousand, eleven".