20021222011121 has 16 divisors (see below), whose sum is σ = 21101201716608. Its totient is φ = 18958941724800.

The previous prime is 20021222011061. The next prime is 20021222011139. The reversal of 20021222011121 is 12111022212002.

It is a cyclic number.

It is not a de Polignac number, because 20021222011121 - 2¹⁴ = 20021221994737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021222011121.

It is not an unprimeable number, because it can be changed into a prime (20021222016121) 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 15 ways as a sum of consecutive naturals, for example, 898151 + ... + 6391331.

It is an arithmetic number, because the mean of its divisors is an integer number (1318825107288).

Almost surely, 2^{20021222011121} is an apocalyptic number.

It is an amenable number.

20021222011121 is a deficient number, since it is larger than the sum of its proper divisors (1079979705487).

20021222011121 is a wasteful number, since it uses less digits than its factorization.

20021222011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494792.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021222011121 its reverse (12111022212002), we get a palindrome (32132244223123).

The spelling of 20021222011121 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".