121220203299 has 16 divisors (see below), whose sum is σ = 174066100992. Its totient is φ = 74594338848.

The previous prime is 121220203289. The next prime is 121220203337. The reversal of 121220203299 is 992302022121.

It is a happy number.

It is not a de Polignac number, because 121220203299 - 2¹¹ = 121220201251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220203219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824664 + ... + 1889930.

It is an arithmetic number, because the mean of its divisors is an integer number (10879131312).

Almost surely, 2^121220203299 is an apocalyptic number.

121220203299 is a deficient number, since it is larger than the sum of its proper divisors (52845897693).

121220203299 is a wasteful number, since it uses less digits than its factorization.

121220203299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112906.

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 121220203299 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, two hundred ninety-nine".