22101021212209 has 4 divisors (see below), whose sum is σ = 22102404876916. Its totient is φ = 22099637547504.

The previous prime is 22101021212183. The next prime is 22101021212267. The reversal of 22101021212209 is 90221212010122.

It is a happy number.

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 12800137641984 + 9300883570225 = 3577728^2 + 3049735^2 .

It is a cyclic number.

It is not a de Polignac number, because 22101021212209 - 2¹⁷ = 22101021081137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101021213209) 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, 691808394 + ... + 691840339.

It is an arithmetic number, because the mean of its divisors is an integer number (5525601219229).

Almost surely, 2^{22101021212209} is an apocalyptic number.

It is an amenable number.

22101021212209 is a deficient number, since it is larger than the sum of its proper divisors (1383664707).

22101021212209 is a wasteful number, since it uses less digits than its factorization.

22101021212209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383664706.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 22101021212209 in words is "twenty-two trillion, one hundred one billion, twenty-one million, two hundred twelve thousand, two hundred nine".