2012210230021 has 2 divisors, whose sum is σ = 2012210230022. Its totient is φ = 2012210230020.

The previous prime is 2012210229979. The next prime is 2012210230091. The reversal of 2012210230021 is 1200320122102.

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., 1104075562500 + 908134667521 = 1050750^2 + 952961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012210230021 - 2⁷ = 2012210229893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012210229977 and 2012210230004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012210230091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006105115010 + 1006105115011.

It is an arithmetic number, because the mean of its divisors is an integer number (1006105115011).

Almost surely, 2^{2012210230021} is an apocalyptic number.

It is an amenable number.

2012210230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012210230021 is an equidigital number, since it uses as much as digits as its factorization.

2012210230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2012210230021 its reverse (1200320122102), we get a palindrome (3212530352123).

The spelling of 2012210230021 in words is "two trillion, twelve billion, two hundred ten million, two hundred thirty thousand, twenty-one".