221222012122122 has 16 divisors (see below), whose sum is σ = 482666208266592. Its totient is φ = 67036973370320.

The previous prime is 221222012122121. The next prime is 221222012122129. The reversal of 221222012122122 is 221221210222122.

It is a happy number.

It is a super-2 number, since 2×221222012122122² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221222012122092 and 221222012122101.

It is not an unprimeable number, because it can be changed into a prime (221222012122121) 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, 1675924334193 + ... + 1675924334324.

It is an arithmetic number, because the mean of its divisors is an integer number (30166638016662).

Almost surely, 2^{221222012122122} is an apocalyptic number.

221222012122122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221222012122122 is an abundant number, since it is smaller than the sum of its proper divisors (261444196144470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221222012122122 is a wasteful number, since it uses less digits than its factorization.

221222012122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351848668533.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 221222012122122 its reverse (221221210222122), we get a palindrome (442443222344244).

The spelling of 221222012122122 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twelve million, one hundred twenty-two thousand, one hundred twenty-two".