20012212011 has 16 divisors (see below), whose sum is σ = 29518656768. Its totient is φ = 11957786400.

The previous prime is 20012212009. The next prime is 20012212067. The reversal of 20012212011 is 11021221002.

It is not a de Polignac number, because 20012212011 - 2¹ = 20012212009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012210011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4268296 + ... + 4272981.

It is an arithmetic number, because the mean of its divisors is an integer number (1844916048).

Almost surely, 2^20012212011 is an apocalyptic number.

20012212011 is a deficient number, since it is larger than the sum of its proper divisors (9506444757).

20012212011 is a wasteful number, since it uses less digits than its factorization.

20012212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8541362.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20012212011 its reverse (11021221002), we get a palindrome (31033433013).

The spelling of 20012212011 in words is "twenty billion, twelve million, two hundred twelve thousand, eleven".