10002012011221 has 2 divisors, whose sum is σ = 10002012011222. Its totient is φ = 10002012011220.

The previous prime is 10002012011213. The next prime is 10002012011273. The reversal of 10002012011221 is 12211021020001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7927012095025 + 2074999916196 = 2815495^2 + 1440486^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002012011221 - 2³ = 10002012011213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002012011021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001006005610 + 5001006005611.

It is an arithmetic number, because the mean of its divisors is an integer number (5001006005611).

Almost surely, 2^{10002012011221} is an apocalyptic number.

It is an amenable number.

10002012011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002012011221 is an equidigital number, since it uses as much as digits as its factorization.

10002012011221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10002012011221 its reverse (12211021020001), we get a palindrome (22213033031222).

The spelling of 10002012011221 in words is "ten trillion, two billion, twelve million, eleven thousand, two hundred twenty-one".