211222010202121 has 2 divisors, whose sum is σ = 211222010202122. Its totient is φ = 211222010202120.

The previous prime is 211222010202109. The next prime is 211222010202127. The reversal of 211222010202121 is 121202010222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156983734369225 + 54238275832896 = 12529315^2 + 7364664^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222010202121 - 2³⁵ = 211187650463753 is a prime.

It is a super-2 number, since 2×211222010202121² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222010202127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611005101060 + 105611005101061.

It is an arithmetic number, because the mean of its divisors is an integer number (105611005101061).

Almost surely, 2^{211222010202121} is an apocalyptic number.

It is an amenable number.

211222010202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222010202121 is an equidigital number, since it uses as much as digits as its factorization.

211222010202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211222010202121 its reverse (121202010222112), we get a palindrome (332424020424233).

The spelling of 211222010202121 in words is "two hundred eleven trillion, two hundred twenty-two billion, ten million, two hundred two thousand, one hundred twenty-one".