20122221201121 has 32 divisors (see below), whose sum is σ = 22071216570368. Its totient is φ = 18233709742080.

The previous prime is 20122221201119. The next prime is 20122221201161. The reversal of 20122221201121 is 12110212222102.

It is a cyclic number.

It is not a de Polignac number, because 20122221201121 - 2¹ = 20122221201119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122221201161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 789992416 + ... + 790017886.

It is an arithmetic number, because the mean of its divisors is an integer number (689725517824).

Almost surely, 2^{20122221201121} is an apocalyptic number.

It is an amenable number.

20122221201121 is a deficient number, since it is larger than the sum of its proper divisors (1948995369247).

20122221201121 is a wasteful number, since it uses less digits than its factorization.

20122221201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30641.

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

Adding to 20122221201121 its reverse (12110212222102), we get a palindrome (32232433423223).

The spelling of 20122221201121 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-one".