1212210011101 has 2 divisors, whose sum is σ = 1212210011102. Its totient is φ = 1212210011100.

The previous prime is 1212210011041. The next prime is 1212210011141. The reversal of 1212210011101 is 1011100122121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970638744100 + 241571267001 = 985210^2 + 491499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212210011101 - 2¹¹ = 1212210009053 is a prime.

It is a super-2 number, since 2×1212210011101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212210011141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105005550 + 606105005551.

It is an arithmetic number, because the mean of its divisors is an integer number (606105005551).

Almost surely, 2^{1212210011101} is an apocalyptic number.

It is an amenable number.

1212210011101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210011101 is an equidigital number, since it uses as much as digits as its factorization.

1212210011101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212210011101 its reverse (1011100122121), we get a palindrome (2223310133222).

The spelling of 1212210011101 in words is "one trillion, two hundred twelve billion, two hundred ten million, eleven thousand, one hundred one".