121101101899 has 2 divisors, whose sum is σ = 121101101900. Its totient is φ = 121101101898.

The previous prime is 121101101897. The next prime is 121101101909. The reversal of 121101101899 is 998101101121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121101101899 - 2¹ = 121101101897 is a prime.

Together with 121101101897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121101101897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550550949 + 60550550950.

It is an arithmetic number, because the mean of its divisors is an integer number (60550550950).

Almost surely, 2^121101101899 is an apocalyptic number.

121101101899 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101101899 is an equidigital number, since it uses as much as digits as its factorization.

121101101899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 121101101899 in words is "one hundred twenty-one billion, one hundred one million, one hundred one thousand, eight hundred ninety-nine".