20212122221211 has 8 divisors (see below), whose sum is σ = 26949673331280. Its totient is φ = 13474659629312.

The previous prime is 20212122221197. The next prime is 20212122221237. The reversal of 20212122221211 is 11212222121202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212122221211 - 2¹⁸ = 20212121959067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20212122221411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21594906 + ... + 22511423.

It is an arithmetic number, because the mean of its divisors is an integer number (3368709166410).

Almost surely, 2^{20212122221211} is an apocalyptic number.

20212122221211 is a deficient number, since it is larger than the sum of its proper divisors (6737551110069).

20212122221211 is a wasteful number, since it uses less digits than its factorization.

20212122221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44259085.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 20212122221211 its reverse (11212222121202), we get a palindrome (31424344342413).

The spelling of 20212122221211 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".