22121201121021 has 16 divisors (see below), whose sum is σ = 32779074179520. Its totient is φ = 14744351447280.

The previous prime is 22121201121017. The next prime is 22121201121067. The reversal of 22121201121021 is 12012110212122.

22121201121021 is a `hidden beast` number, since 221 + 212 + 0 + 1 + 1 + 210 + 21 = 666.

It is not a de Polignac number, because 22121201121021 - 2² = 22121201121017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121201120985 and 22121201121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121201121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86424475 + ... + 86680056.

It is an arithmetic number, because the mean of its divisors is an integer number (2048692136220).

Almost surely, 2^{22121201121021} is an apocalyptic number.

It is an amenable number.

22121201121021 is a deficient number, since it is larger than the sum of its proper divisors (10657873058499).

22121201121021 is a wasteful number, since it uses less digits than its factorization.

22121201121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173109273 (or 173109267 counting only the distinct ones).

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

Adding to 22121201121021 its reverse (12012110212122), we get a palindrome (34133311333143).

The spelling of 22121201121021 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, twenty-one".