121222021221011 has 2 divisors, whose sum is σ = 121222021221012. Its totient is φ = 121222021221010.

The previous prime is 121222021220977. The next prime is 121222021221023. The reversal of 121222021221011 is 110122120222121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121222021221011 - 2¹⁰ = 121222021219987 is a prime.

It is not a weakly prime, because it can be changed into another prime (121222023221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611010610505 + 60611010610506.

It is an arithmetic number, because the mean of its divisors is an integer number (60611010610506).

Almost surely, 2^{121222021221011} is an apocalyptic number.

121222021221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222021221011 is an equidigital number, since it uses as much as digits as its factorization.

121222021221011 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 20.

Adding to 121222021221011 its reverse (110122120222121), we get a palindrome (231344141443132).

The spelling of 121222021221011 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, twenty-one million, two hundred twenty-one thousand, eleven".