2220210012821 has 2 divisors, whose sum is σ = 2220210012822. Its totient is φ = 2220210012820.

The previous prime is 2220210012803. The next prime is 2220210012883. The reversal of 2220210012821 is 1282100120222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1517119377796 + 703090635025 = 1231714^2 + 838505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220210012821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220210014821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110105006410 + 1110105006411.

It is an arithmetic number, because the mean of its divisors is an integer number (1110105006411).

Almost surely, 2^{2220210012821} is an apocalyptic number.

It is an amenable number.

2220210012821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220210012821 is an equidigital number, since it uses as much as digits as its factorization.

2220210012821 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2220210012821 in words is "two trillion, two hundred twenty billion, two hundred ten million, twelve thousand, eight hundred twenty-one".