20012212221211 has 16 divisors (see below), whose sum is σ = 23228445590784. Its totient is φ = 16886775874464.

The previous prime is 20012212221191. The next prime is 20012212221251. The reversal of 20012212221211 is 11212221221002.

It is a cyclic number.

It is not a de Polignac number, because 20012212221211 - 2⁷ = 20012212221083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012212221251) 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, 60691456 + ... + 61020301.

It is an arithmetic number, because the mean of its divisors is an integer number (1451777849424).

Almost surely, 2^{20012212221211} is an apocalyptic number.

20012212221211 is a deficient number, since it is larger than the sum of its proper divisors (3216233369573).

20012212221211 is a wasteful number, since it uses less digits than its factorization.

20012212221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121712130.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20012212221211 its reverse (11212221221002), we get a palindrome (31224433442213).

The spelling of 20012212221211 in words is "twenty trillion, twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred eleven".