121223220299 has 4 divisors (see below), whose sum is σ = 121427644536. Its totient is φ = 121018796064.

The previous prime is 121223220277. The next prime is 121223220317. The reversal of 121223220299 is 992022322121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992022322121 = 739 ⋅1342384739.

It is a cyclic number.

It is not a de Polignac number, because 121223220299 - 2¹⁶ = 121223154763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121223229299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102211229 + ... + 102212414.

It is an arithmetic number, because the mean of its divisors is an integer number (30356911134).

Almost surely, 2^121223220299 is an apocalyptic number.

121223220299 is a deficient number, since it is larger than the sum of its proper divisors (204424237).

121223220299 is an equidigital number, since it uses as much as digits as its factorization.

121223220299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204424236.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 121223220299 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred twenty thousand, two hundred ninety-nine".