122021012211221 has 2 divisors, whose sum is σ = 122021012211222. Its totient is φ = 122021012211220.

The previous prime is 122021012211181. The next prime is 122021012211251. The reversal of 122021012211221 is 122112210120221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122020986708721 + 25502500 = 11046311^2 + 5050^2 .

It is an emirp because it is prime and its reverse (122112210120221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122021012211221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122021012211193 and 122021012211202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122021012211251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010506105610 + 61010506105611.

It is an arithmetic number, because the mean of its divisors is an integer number (61010506105611).

Almost surely, 2^{122021012211221} is an apocalyptic number.

It is an amenable number.

122021012211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122021012211221 is an equidigital number, since it uses as much as digits as its factorization.

122021012211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122021012211221 its reverse (122112210120221), we get a palindrome (244133222331442).

The spelling of 122021012211221 in words is "one hundred twenty-two trillion, twenty-one billion, twelve million, two hundred eleven thousand, two hundred twenty-one".