22200001212121 has 4 divisors (see below), whose sum is σ = 22200228357172. Its totient is φ = 22199774067072.

The previous prime is 22200001212107. The next prime is 22200001212139. The reversal of 22200001212121 is 12121210000222.

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 15200992334025 + 6999008878096 = 3898845^2 + 2645564^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200001212121 - 2⁵ = 22200001212089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22200001212095 and 22200001212104.

It is not an unprimeable number, because it can be changed into a prime (22200001212101) 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, 113425860 + ... + 113621413.

It is an arithmetic number, because the mean of its divisors is an integer number (5550057089293).

Almost surely, 2^{22200001212121} is an apocalyptic number.

It is an amenable number.

22200001212121 is a deficient number, since it is larger than the sum of its proper divisors (227145051).

22200001212121 is an equidigital number, since it uses as much as digits as its factorization.

22200001212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227145050.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22200001212121 its reverse (12121210000222), we get a palindrome (34321211212343).

The spelling of 22200001212121 in words is "twenty-two trillion, two hundred billion, one million, two hundred twelve thousand, one hundred twenty-one".