22110010100021 has 4 divisors (see below), whose sum is σ = 23410598929452. Its totient is φ = 20809421270592.

The previous prime is 22110010099981. The next prime is 22110010100039. The reversal of 22110010100021 is 12000101001122.

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 12536988459121 + 9573021640900 = 3540761^2 + 3094030^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110010100021 - 2¹⁰ = 22110010098997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22110010099975 and 22110010100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110010100081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650294414690 + ... + 650294414723.

It is an arithmetic number, because the mean of its divisors is an integer number (5852649732363).

Almost surely, 2^{22110010100021} is an apocalyptic number.

It is an amenable number.

22110010100021 is a deficient number, since it is larger than the sum of its proper divisors (1300588829431).

22110010100021 is a wasteful number, since it uses less digits than its factorization.

22110010100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300588829430.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22110010100021 its reverse (12000101001122), we get a palindrome (34110111101143).

The spelling of 22110010100021 in words is "twenty-two trillion, one hundred ten billion, ten million, one hundred thousand, twenty-one".