20212222121011 has 4 divisors (see below), whose sum is σ = 20260232150224. Its totient is φ = 20164212091800.

The previous prime is 20212222120973. The next prime is 20212222121027. The reversal of 20212222121011 is 11012122221202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20212222121011 - 2¹⁵ = 20212222088243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212222121011.

It is not an unprimeable number, because it can be changed into a prime (20212222121051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24005013975 + ... + 24005014816.

It is an arithmetic number, because the mean of its divisors is an integer number (5065058037556).

Almost surely, 2^{20212222121011} is an apocalyptic number.

20212222121011 is a deficient number, since it is larger than the sum of its proper divisors (48010029213).

20212222121011 is an equidigital number, since it uses as much as digits as its factorization.

20212222121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48010029212.

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

Adding to 20212222121011 its reverse (11012122221202), we get a palindrome (31224344342213).

The spelling of 20212222121011 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".