221222202021122 has 16 divisors (see below), whose sum is σ = 346335415243200. Its totient is φ = 105779135198352.

The previous prime is 221222202021109. The next prime is 221222202021127. The reversal of 221222202021122 is 221120202222122.

It is a super-2 number, since 2×221222202021122² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (221222202021127) 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, 517681997 + ... + 518109152.

It is an arithmetic number, because the mean of its divisors is an integer number (21645963452700).

Almost surely, 2^{221222202021122} is an apocalyptic number.

221222202021122 is a deficient number, since it is larger than the sum of its proper divisors (125113213222078).

221222202021122 is a wasteful number, since it uses less digits than its factorization.

221222202021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035795817.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221222202021122 its reverse (221120202222122), we get a palindrome (442342404243244).

The spelling of 221222202021122 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred two million, twenty-one thousand, one hundred twenty-two".