121222020099 has 32 divisors (see below), whose sum is σ = 181310791680. Its totient is φ = 71674349472.

The previous prime is 121222020097. The next prime is 121222020109. The reversal of 121222020099 is 990020222121.

It is not a de Polignac number, because 121222020099 - 2¹ = 121222020097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121222020097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 922057 + ... + 1045290.

It is an arithmetic number, because the mean of its divisors is an integer number (5665962240).

Almost surely, 2^121222020099 is an apocalyptic number.

121222020099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121222020099 is a deficient number, since it is larger than the sum of its proper divisors (60088771581).

121222020099 is a wasteful number, since it uses less digits than its factorization.

121222020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967439.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 121222020099 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty thousand, ninety-nine".