20111220212222 has 16 divisors (see below), whose sum is σ = 30384736971120. Its totient is φ = 9982978741632.

The previous prime is 20111220212179. The next prime is 20111220212323. The reversal of 20111220212222 is 22221202211102.

It is a super-2 number, since 2×20111220212222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111220212194 and 20111220212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8743568 + ... + 10801500.

It is an arithmetic number, because the mean of its divisors is an integer number (1899046060695).

Almost surely, 2^{20111220212222} is an apocalyptic number.

20111220212222 is a deficient number, since it is larger than the sum of its proper divisors (10273516758898).

20111220212222 is a wasteful number, since it uses less digits than its factorization.

20111220212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093227.

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

Adding to 20111220212222 its reverse (22221202211102), we get a palindrome (42332422423324).

The spelling of 20111220212222 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-two".