1212221201011 has 2 divisors, whose sum is σ = 1212221201012. Its totient is φ = 1212221201010.

The previous prime is 1212221200997. The next prime is 1212221201047. The reversal of 1212221201011 is 1101021222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212221201011 - 2¹¹ = 1212221198963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212221201311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606110600505 + 606110600506.

It is an arithmetic number, because the mean of its divisors is an integer number (606110600506).

Almost surely, 2^{1212221201011} is an apocalyptic number.

1212221201011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212221201011 is an equidigital number, since it uses as much as digits as its factorization.

1212221201011 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 1212221201011 its reverse (1101021222121), we get a palindrome (2313242423132).

The spelling of 1212221201011 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, eleven".