2212211001221 has 32 divisors (see below), whose sum is σ = 2522318736000. Its totient is φ = 1923365668608.

The previous prime is 2212211001103. The next prime is 2212211001227. The reversal of 2212211001221 is 1221001122122.

It is not a de Polignac number, because 2212211001221 - 2¹⁸ = 2212210739077 is a prime.

It is a super-4 number, since 4×2212211001221⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2212211001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212211001227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40075586 + ... + 40130748.

It is an arithmetic number, because the mean of its divisors is an integer number (78822460500).

Almost surely, 2^{2212211001221} is an apocalyptic number.

It is an amenable number.

2212211001221 is a deficient number, since it is larger than the sum of its proper divisors (310107734779).

2212211001221 is a wasteful number, since it uses less digits than its factorization.

2212211001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56133.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2212211001221 its reverse (1221001122122), we get a palindrome (3433212123343).

The spelling of 2212211001221 in words is "two trillion, two hundred twelve billion, two hundred eleven million, one thousand, two hundred twenty-one".