2212221021121 has 4 divisors (see below), whose sum is σ = 2243379063744. Its totient is φ = 2181062978500.

The previous prime is 2212221021107. The next prime is 2212221021133. The reversal of 2212221021121 is 1211201222122.

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 a cyclic number.

It is not a de Polignac number, because 2212221021121 - 2⁵ = 2212221021089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212221021721) 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, 15579021205 + ... + 15579021346.

It is an arithmetic number, because the mean of its divisors is an integer number (560844765936).

Almost surely, 2^{2212221021121} is an apocalyptic number.

It is an amenable number.

2212221021121 is a deficient number, since it is larger than the sum of its proper divisors (31158042623).

2212221021121 is an equidigital number, since it uses as much as digits as its factorization.

2212221021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31158042622.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2212221021121 its reverse (1211201222122), we get a palindrome (3423422243243).

The spelling of 2212221021121 in words is "two trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-one".