20212121200011 has 16 divisors (see below), whose sum is σ = 30729740829984. Its totient is φ = 11706567934464.

The previous prime is 20212121200009. The next prime is 20212121200013. The reversal of 20212121200011 is 11000212121202.

It is an interprime number because it is at equal distance from previous prime (20212121200009) and next prime (20212121200013).

It is not a de Polignac number, because 20212121200011 - 2¹ = 20212121200009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20212121200013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15242926336 + ... + 15242927661.

It is an arithmetic number, because the mean of its divisors is an integer number (1920608801874).

Almost surely, 2^{20212121200011} is an apocalyptic number.

20212121200011 is a deficient number, since it is larger than the sum of its proper divisors (10517619629973).

20212121200011 is a wasteful number, since it uses less digits than its factorization.

20212121200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30485854030.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20212121200011 its reverse (11000212121202), we get a palindrome (31212333321213).

It can be divided in two parts, 2021212 and 1200011, that added together give a palindrome (3221223).

The spelling of 20212121200011 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred thousand, eleven".