20122000111221 has 32 divisors (see below), whose sum is σ = 27422195632128. Its totient is φ = 13119862117440.

The previous prime is 20122000111181. The next prime is 20122000111231. The reversal of 20122000111221 is 12211100022102.

It is not a de Polignac number, because 20122000111221 - 2²² = 20121995916917 is a prime.

It is a super-2 number, since 2×20122000111221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20122000111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122000111231) 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, 198958456 + ... + 199059566.

It is an arithmetic number, because the mean of its divisors is an integer number (856943613504).

Almost surely, 2^{20122000111221} is an apocalyptic number.

It is an amenable number.

20122000111221 is a deficient number, since it is larger than the sum of its proper divisors (7300195520907).

20122000111221 is a wasteful number, since it uses less digits than its factorization.

20122000111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105121.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20122000111221 its reverse (12211100022102), we get a palindrome (32333100133323).

The spelling of 20122000111221 in words is "twenty trillion, one hundred twenty-two billion, one hundred eleven thousand, two hundred twenty-one".