22222121202101 has 4 divisors (see below), whose sum is σ = 22442142204204. Its totient is φ = 22002100200000.

The previous prime is 22222121202019. The next prime is 22222121202103. The reversal of 22222121202101 is 10120212122222.

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 16459005580900 + 5763115621201 = 4056970^2 + 2400649^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222121202101 - 2¹⁸ = 22222120939957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222121202103) 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, 110010500900 + ... + 110010501101.

It is an arithmetic number, because the mean of its divisors is an integer number (5610535551051).

Almost surely, 2^{22222121202101} is an apocalyptic number.

It is an amenable number.

22222121202101 is a deficient number, since it is larger than the sum of its proper divisors (220021002103).

22222121202101 is a wasteful number, since it uses less digits than its factorization.

22222121202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220021002102.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22222121202101 its reverse (10120212122222), we get a palindrome (32342333324323).

The spelling of 22222121202101 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred two thousand, one hundred one".