121123212101 has 2 divisors, whose sum is σ = 121123212102. Its totient is φ = 121123212100.

The previous prime is 121123212097. The next prime is 121123212103. The reversal of 121123212101 is 101212321121.

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., 95620719076 + 25502493025 = 309226^2 + 159695^2 .

It is an emirp because it is prime and its reverse (101212321121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121123212101 - 2² = 121123212097 is a prime.

Together with 121123212103, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121123212101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121123212103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561606050 + 60561606051.

It is an arithmetic number, because the mean of its divisors is an integer number (60561606051).

Almost surely, 2^121123212101 is an apocalyptic number.

It is an amenable number.

121123212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121123212101 is an equidigital number, since it uses as much as digits as its factorization.

121123212101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121123212101 its reverse (101212321121), we get a palindrome (222335533222).

The spelling of 121123212101 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred twelve thousand, one hundred one".