22220220012121 has 4 divisors (see below), whose sum is σ = 22424075241700. Its totient is φ = 22016364782544.

The previous prime is 22220220012119. The next prime is 22220220012139. The reversal of 22220220012121 is 12121002202222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9454462685721 + 12765757326400 = 3074811^2 + 3572920^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220220012121 - 2¹ = 22220220012119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220220012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101927614626 + ... + 101927614843.

It is an arithmetic number, because the mean of its divisors is an integer number (5606018810425).

Almost surely, 2^{22220220012121} is an apocalyptic number.

It is an amenable number.

22220220012121 is a deficient number, since it is larger than the sum of its proper divisors (203855229579).

22220220012121 is a wasteful number, since it uses less digits than its factorization.

22220220012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203855229578.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22220220012121 its reverse (12121002202222), we get a palindrome (34341222214343).

The spelling of 22220220012121 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty million, twelve thousand, one hundred twenty-one".