121211101201 has 2 divisors, whose sum is σ = 121211101202. Its totient is φ = 121211101200.

The previous prime is 121211101199. The next prime is 121211101259. The reversal of 121211101201 is 102101112121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90288230400 + 30922870801 = 300480^2 + 175849^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211101201 - 2¹ = 121211101199 is a prime.

Together with 121211101199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121211111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605550600 + 60605550601.

It is an arithmetic number, because the mean of its divisors is an integer number (60605550601).

Almost surely, 2^121211101201 is an apocalyptic number.

It is an amenable number.

121211101201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211101201 is an equidigital number, since it uses as much as digits as its factorization.

121211101201 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 121211101201 its reverse (102101112121), we get a palindrome (223312213322).

The spelling of 121211101201 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred one".