20011122122222 has 16 divisors (see below), whose sum is σ = 37423397215872. Its totient is φ = 7796541086520.

The previous prime is 20011122122209. The next prime is 20011122122227. The reversal of 20011122122222 is 22222122111002.

It is a super-2 number, since 2×20011122122222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011122122194 and 20011122122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011122122227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64971175568 + ... + 64971175875.

It is an arithmetic number, because the mean of its divisors is an integer number (2338962325992).

Almost surely, 2^{20011122122222} is an apocalyptic number.

20011122122222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20011122122222 is a deficient number, since it is larger than the sum of its proper divisors (17412275093650).

20011122122222 is a wasteful number, since it uses less digits than its factorization.

20011122122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129942351463.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20011122122222 its reverse (22222122111002), we get a palindrome (42233244233224).

The spelling of 20011122122222 in words is "twenty trillion, eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".