22101220212121 has 4 divisors (see below), whose sum is σ = 22101321341200. Its totient is φ = 22101119083044.

The previous prime is 22101220212109. The next prime is 22101220212131. The reversal of 22101220212121 is 12121202210122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22101220212121 - 2¹¹ = 22101220210073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101220212131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50236011 + ... + 50674048.

It is an arithmetic number, because the mean of its divisors is an integer number (5525330335300).

Almost surely, 2^{22101220212121} is an apocalyptic number.

It is an amenable number.

22101220212121 is a deficient number, since it is larger than the sum of its proper divisors (101129079).

22101220212121 is a wasteful number, since it uses less digits than its factorization.

22101220212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101129078.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22101220212121 its reverse (12121202210122), we get a palindrome (34222422422243).

The spelling of 22101220212121 in words is "twenty-two trillion, one hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".