22100212121012 has 18 divisors (see below), whose sum is σ = 38785244418438. Its totient is φ = 11018802395392.

The previous prime is 22100212121011. The next prime is 22100212121047. The reversal of 22100212121012 is 21012121200122.

It can be written as a sum of positive squares in 3 ways, for example, as 3481970928016 + 18618241192996 = 1866004^2 + 4314886^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100212121011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21671123 + ... + 22667994.

Almost surely, 2^{22100212121012} is an apocalyptic number.

It is an amenable number.

22100212121012 is a deficient number, since it is larger than the sum of its proper divisors (16685032297426).

22100212121012 is an equidigital number, since it uses as much as digits as its factorization.

22100212121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44339827 (or 44339472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22100212121012 its reverse (21012121200122), we get a palindrome (43112333321134).

The spelling of 22100212121012 in words is "twenty-two trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, twelve".