22121211111101 has 8 divisors (see below), whose sum is σ = 22143565361400. Its totient is φ = 22098858209280.

The previous prime is 22121211111061. The next prime is 22121211111119. The reversal of 22121211111101 is 10111111212122.

It can be written as a sum of positive squares in 4 ways, for example, as 13985909571076 + 8135301540025 = 3739774^2 + 2852245^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121211111101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121211111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121211110101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34281005 + ... + 34920333.

It is an arithmetic number, because the mean of its divisors is an integer number (2767945670175).

Almost surely, 2^{22121211111101} is an apocalyptic number.

It is an amenable number.

22121211111101 is a deficient number, since it is larger than the sum of its proper divisors (22354250299).

22121211111101 is a wasteful number, since it uses less digits than its factorization.

22121211111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674239.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 22121211111101 its reverse (10111111212122), we get a palindrome (32232322323223).

The spelling of 22121211111101 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, one hundred one".