22121121102021 has 12 divisors (see below), whose sum is σ = 31976207890380. Its totient is φ = 14736578340480.

The previous prime is 22121121102007. The next prime is 22121121102071. The reversal of 22121121102021 is 12020112112122.

22121121102021 is a `hidden beast` number, since 221 + 211 + 21 + 10 + 202 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1061695308996 + 21059425793025 = 1030386^2 + 4589055^2 .

It is not a de Polignac number, because 22121121102021 - 2¹⁰ = 22121121100997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121121101985 and 22121121102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121121102071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 902964366 + ... + 902988863.

It is an arithmetic number, because the mean of its divisors is an integer number (2664683990865).

Almost surely, 2^{22121121102021} is an apocalyptic number.

It is an amenable number.

22121121102021 is a deficient number, since it is larger than the sum of its proper divisors (9855086788359).

22121121102021 is a wasteful number, since it uses less digits than its factorization.

22121121102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805954596 (or 1805954593 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22121121102021 its reverse (12020112112122), we get a palindrome (34141233214143).

It can be divided in two parts, 2212112 and 1102021, that added together give a palindrome (3314133).

The spelling of 22121121102021 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, twenty-one".