2212200121 has 4 divisors (see below), whose sum is σ = 2212710372. Its totient is φ = 2211689872.

The previous prime is 2212200119. The next prime is 2212200143. The reversal of 2212200121 is 1210022122.

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 888695721 + 1323504400 = 29811^2 + 36380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212200121 - 2¹ = 2212200119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212230121) 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, 248566 + ... + 257311.

It is an arithmetic number, because the mean of its divisors is an integer number (553177593).

Almost surely, 2^2212200121 is an apocalyptic number.

It is an amenable number.

2212200121 is a deficient number, since it is larger than the sum of its proper divisors (510251).

2212200121 is an equidigital number, since it uses as much as digits as its factorization.

2212200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510250.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2212200121 is about 47034.0315197411. The cubic root of 2212200121 is about 1302.9911638460.

Adding to 2212200121 its reverse (1210022122), we get a palindrome (3422222243).

The spelling of 2212200121 in words is "two billion, two hundred twelve million, two hundred thousand, one hundred twenty-one".