10211022101221 has 2 divisors, whose sum is σ = 10211022101222. Its totient is φ = 10211022101220.

The previous prime is 10211022101209. The next prime is 10211022101257. The reversal of 10211022101221 is 12210122011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10160086125121 + 50935976100 = 3187489^2 + 225690^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211022101221 - 2¹⁹ = 10211021576933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211022101195 and 10211022101204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211022101261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105511050610 + 5105511050611.

It is an arithmetic number, because the mean of its divisors is an integer number (5105511050611).

Almost surely, 2^{10211022101221} is an apocalyptic number.

It is an amenable number.

10211022101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211022101221 is an equidigital number, since it uses as much as digits as its factorization.

10211022101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10211022101221 its reverse (12210122011201), we get a palindrome (22421144112422).

The spelling of 10211022101221 in words is "ten trillion, two hundred eleven billion, twenty-two million, one hundred one thousand, two hundred twenty-one".