20122222120221 has 64 divisors (see below), whose sum is σ = 29373619968000. Its totient is φ = 12178532300544.

The previous prime is 20122222120201. The next prime is 20122222120229. The reversal of 20122222120221 is 12202122222102.

It is not a de Polignac number, because 20122222120221 - 2¹⁵ = 20122222087453 is a prime.

It is a super-2 number, since 2×20122222120221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122222120229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1318704090 + ... + 1318719348.

It is an arithmetic number, because the mean of its divisors is an integer number (458962812000).

Almost surely, 2^{20122222120221} is an apocalyptic number.

It is an amenable number.

20122222120221 is a deficient number, since it is larger than the sum of its proper divisors (9251397847779).

20122222120221 is a wasteful number, since it uses less digits than its factorization.

20122222120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17170.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20122222120221 its reverse (12202122222102), we get a palindrome (32324344342323).

The spelling of 20122222120221 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty-one".