20112201222121 has 16 divisors (see below), whose sum is σ = 20718070078464. Its totient is φ = 19515339361024.

The previous prime is 20112201222103. The next prime is 20112201222149. The reversal of 20112201222121 is 12122210221102.

It is not a de Polignac number, because 20112201222121 - 2⁵ = 20112201222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112201222161) 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, 372600 + ... + 6353206.

It is an arithmetic number, because the mean of its divisors is an integer number (1294879379904).

Almost surely, 2^{20112201222121} is an apocalyptic number.

It is an amenable number.

20112201222121 is a deficient number, since it is larger than the sum of its proper divisors (605868856343).

20112201222121 is a wasteful number, since it uses less digits than its factorization.

20112201222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5981360.

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

Adding to 20112201222121 its reverse (12122210221102), we get a palindrome (32234411443223).

The spelling of 20112201222121 in words is "twenty trillion, one hundred twelve billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".