221110122221012 has 48 divisors (see below), whose sum is σ = 388299964259088. Its totient is φ = 110168051374080.

The previous prime is 221110122220997. The next prime is 221110122221057. The reversal of 221110122221012 is 210122221011122.

It can be written as a sum of positive squares in 8 ways, for example, as 15072921052996 + 206037201168016 = 3882386^2 + 14353996^2 .

It is a super-2 number, since 2×221110122221012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5269901138 + ... + 5269943094.

It is an arithmetic number, because the mean of its divisors is an integer number (8089582588731).

Almost surely, 2^{221110122221012} is an apocalyptic number.

It is an amenable number.

221110122221012 is a deficient number, since it is larger than the sum of its proper divisors (167189842038076).

221110122221012 is a wasteful number, since it uses less digits than its factorization.

221110122221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46476 (or 46474 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221110122221012 its reverse (210122221011122), we get a palindrome (431232343232134).

The spelling of 221110122221012 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-two million, two hundred twenty-one thousand, twelve".