2212214122121 has 4 divisors (see below), whose sum is σ = 2212545645972. Its totient is φ = 2211882598272.

The previous prime is 2212214122117. The next prime is 2212214122201. The reversal of 2212214122121 is 1212214122122.

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 937266015625 + 1274948106496 = 968125^2 + 1129136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212214122121 - 2² = 2212214122117 is a prime.

It is a super-2 number, since 2×2212214122121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212214172121) 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, 165751916 + ... + 165765261.

It is an arithmetic number, because the mean of its divisors is an integer number (553136411493).

Almost surely, 2^{2212214122121} is an apocalyptic number.

It is an amenable number.

2212214122121 is a deficient number, since it is larger than the sum of its proper divisors (331523851).

2212214122121 is an equidigital number, since it uses as much as digits as its factorization.

2212214122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331523850.

The product of its digits is 512, while the sum is 23.

Adding to 2212214122121 its reverse (1212214122122), we get a palindrome (3424428244243).

Subtracting from 2212214122121 its reverse (1212214122122), we obtain a palindrome (999999999999).

The spelling of 2212214122121 in words is "two trillion, two hundred twelve billion, two hundred fourteen million, one hundred twenty-two thousand, one hundred twenty-one".