99228499121 has 2 divisors, whose sum is σ = 99228499122. Its totient is φ = 99228499120.

The previous prime is 99228499081. The next prime is 99228499147. The reversal of 99228499121 is 12199482299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93795187600 + 5433311521 = 306260^2 + 73711^2 .

It is an emirp because it is prime and its reverse (12199482299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99228499121 - 2¹⁸ = 99228236977 is a prime.

It is not a weakly prime, because it can be changed into another prime (99228499021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49614249560 + 49614249561.

It is an arithmetic number, because the mean of its divisors is an integer number (49614249561).

Almost surely, 2^99228499121 is an apocalyptic number.

It is an amenable number.

99228499121 is a deficient number, since it is larger than the sum of its proper divisors (1).

99228499121 is an equidigital number, since it uses as much as digits as its factorization.

99228499121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The spelling of 99228499121 in words is "ninety-nine billion, two hundred twenty-eight million, four hundred ninety-nine thousand, one hundred twenty-one".