121211201211011 has 2 divisors, whose sum is σ = 121211201211012. Its totient is φ = 121211201211010.

The previous prime is 121211201210947. The next prime is 121211201211029. The reversal of 121211201211011 is 110112102112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121211201211011 - 2⁶ = 121211201210947 is a prime.

It is not a weakly prime, because it can be changed into another prime (121261201211011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605600605505 + 60605600605506.

It is an arithmetic number, because the mean of its divisors is an integer number (60605600605506).

Almost surely, 2^{121211201211011} is an apocalyptic number.

121211201211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211201211011 is an equidigital number, since it uses as much as digits as its factorization.

121211201211011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121211201211011 its reverse (110112102112121), we get a palindrome (231323303323132).

The spelling of 121211201211011 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred one million, two hundred eleven thousand, eleven".