121210101011 has 2 divisors, whose sum is σ = 121210101012. Its totient is φ = 121210101010.

The previous prime is 121210100959. The next prime is 121210101017. The reversal of 121210101011 is 110101012121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121210101011 - 2¹⁰ = 121210099987 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 121210100983 and 121210101001.

It is not a weakly prime, because it can be changed into another prime (121210101017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605050505 + 60605050506.

It is an arithmetic number, because the mean of its divisors is an integer number (60605050506).

Almost surely, 2^121210101011 is an apocalyptic number.

121210101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210101011 is an equidigital number, since it uses as much as digits as its factorization.

121210101011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121210101011 its reverse (110101012121), we get a palindrome (231311113132).

The spelling of 121210101011 in words is "one hundred twenty-one billion, two hundred ten million, one hundred one thousand, eleven".