20012021022211 has 4 divisors (see below), whose sum is σ = 20012030406432. Its totient is φ = 20012011637992.

The previous prime is 20012021022199. The next prime is 20012021022269. The reversal of 20012021022211 is 11222012021002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20012021022211 - 2¹¹ = 20012021020163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012021025211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222681 + ... + 6330373.

It is an arithmetic number, because the mean of its divisors is an integer number (5003007601608).

Almost surely, 2^{20012021022211} is an apocalyptic number.

20012021022211 is a deficient number, since it is larger than the sum of its proper divisors (9384221).

20012021022211 is an equidigital number, since it uses as much as digits as its factorization.

20012021022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384220.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20012021022211 its reverse (11222012021002), we get a palindrome (31234033043213).

The spelling of 20012021022211 in words is "twenty trillion, twelve billion, twenty-one million, twenty-two thousand, two hundred eleven".