2212121001 has 4 divisors (see below), whose sum is σ = 2949494672. Its totient is φ = 1474747332.

The previous prime is 2212120969. The next prime is 2212121029. The reversal of 2212121001 is 1001212122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2212121001 - 2⁵ = 2212120969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212128001) 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, 368686831 + ... + 368686836.

It is an arithmetic number, because the mean of its divisors is an integer number (737373668).

Almost surely, 2^2212121001 is an apocalyptic number.

It is an amenable number.

2212121001 is a deficient number, since it is larger than the sum of its proper divisors (737373671).

2212121001 is an equidigital number, since it uses as much as digits as its factorization.

2212121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737373670.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2212121001 is about 47033.1904191072. The cubic root of 2212121001 is about 1302.9756297044.

Adding to 2212121001 its reverse (1001212122), we get a palindrome (3213333123).

The spelling of 2212121001 in words is "two billion, two hundred twelve million, one hundred twenty-one thousand, one".