2221111121012 has 18 divisors (see below), whose sum is σ = 4521547639602. Its totient is φ = 951904766064.

The previous prime is 2221111120973. The next prime is 2221111121039. The reversal of 2221111121012 is 2101211111222.

It can be written as a sum of positive squares in only one way, i.e., 2168356381156 + 52754739856 = 1472534^2 + 229684^2 .

It is a super-2 number, since 2×2221111121012² (a number of 25 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 5 ways as a sum of consecutive naturals, for example, 5666099603 + ... + 5666099994.

It is an arithmetic number, because the mean of its divisors is an integer number (251197091089).

Almost surely, 2^{2221111121012} is an apocalyptic number.

It is an amenable number.

2221111121012 is an abundant number, since it is smaller than the sum of its proper divisors (2300436518590).

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

2221111121012 is a wasteful number, since it uses less digits than its factorization.

2221111121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332199615 (or 11332199606 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2221111121012 its reverse (2101211111222), we get a palindrome (4322322232234).

It can be divided in two parts, 22211111210 and 12, that added together give a palindrome (22211111222).

The spelling of 2221111121012 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, twelve".