10211232321221 has 2 divisors, whose sum is σ = 10211232321222. Its totient is φ = 10211232321220.

The previous prime is 10211232321161. The next prime is 10211232321239. The reversal of 10211232321221 is 12212323211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9240049665025 + 971182656196 = 3039745^2 + 985486^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211232321221 - 2²⁶ = 10211165212357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211232320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105616160610 + 5105616160611.

It is an arithmetic number, because the mean of its divisors is an integer number (5105616160611).

Almost surely, 2^{10211232321221} is an apocalyptic number.

It is an amenable number.

10211232321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211232321221 is an equidigital number, since it uses as much as digits as its factorization.

10211232321221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 10211232321221 its reverse (12212323211201), we get a palindrome (22423555532422).

The spelling of 10211232321221 in words is "ten trillion, two hundred eleven billion, two hundred thirty-two million, three hundred twenty-one thousand, two hundred twenty-one".