221210111221122 has 16 divisors (see below), whose sum is σ = 442614181357152. Its totient is φ = 73704377254560.

The previous prime is 221210111221079. The next prime is 221210111221153. The reversal of 221210111221122 is 221122111012122.

It is a super-2 number, since 2×221210111221122² (a number of 29 digits) contains 22 as substring.

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, 8081606628 + ... + 8081633999.

It is an arithmetic number, because the mean of its divisors is an integer number (27663386334822).

Almost surely, 2^{221210111221122} is an apocalyptic number.

221210111221122 is an abundant number, since it is smaller than the sum of its proper divisors (221404070136030).

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

221210111221122 is a wasteful number, since it uses less digits than its factorization.

221210111221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163242913.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221210111221122 its reverse (221122111012122), we get a palindrome (442332222233244).

The spelling of 221210111221122 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".