2212221320129 has 4 divisors (see below), whose sum is σ = 2212227118980. Its totient is φ = 2212215521280.

The previous prime is 2212221320117. The next prime is 2212221320131. The reversal of 2212221320129 is 9210231222122.

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 2055931557904 + 156289762225 = 1433852^2 + 395335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212221320129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212221820129) 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, 2283584 + ... + 3104705.

It is an arithmetic number, because the mean of its divisors is an integer number (553056779745).

Almost surely, 2^{2212221320129} is an apocalyptic number.

It is an amenable number.

2212221320129 is a deficient number, since it is larger than the sum of its proper divisors (5798851).

2212221320129 is an equidigital number, since it uses as much as digits as its factorization.

2212221320129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798850.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 2212221320129 in words is "two trillion, two hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, one hundred twenty-nine".