20010012011 has 4 divisors (see below), whose sum is σ = 21829104024. Its totient is φ = 18190920000.

The previous prime is 20010012007. The next prime is 20010012017. The reversal of 20010012011 is 11021001002.

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

It is not a de Polignac number, because 20010012011 - 2² = 20010012007 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 20010012011.

It is not an unprimeable number, because it can be changed into a prime (20010012017) 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, 909545990 + ... + 909546011.

It is an arithmetic number, because the mean of its divisors is an integer number (5457276006).

Almost surely, 2^20010012011 is an apocalyptic number.

20010012011 is a deficient number, since it is larger than the sum of its proper divisors (1819092013).

20010012011 is a wasteful number, since it uses less digits than its factorization.

20010012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819092012.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20010012011 its reverse (11021001002), we get a palindrome (31031013013).

The spelling of 20010012011 in words is "twenty billion, ten million, twelve thousand, eleven".