122221121985 has 96 divisors (see below), whose sum is σ = 216831783168. Its totient is φ = 63672791040.

The previous prime is 122221121977. The next prime is 122221121987. The reversal of 122221121985 is 589121122221.

122221121985 is a `hidden beast` number, since 1 + 222 + 211 + 219 + 8 + 5 = 666.

It is not a de Polignac number, because 122221121985 - 2³ = 122221121977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122221121987) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 208212862 + ... + 208213448.

It is an arithmetic number, because the mean of its divisors is an integer number (2258664408).

Almost surely, 2^122221121985 is an apocalyptic number.

122221121985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122221121985 is a deficient number, since it is larger than the sum of its proper divisors (94610661183).

122221121985 is a wasteful number, since it uses less digits than its factorization.

122221121985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1172 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The spelling of 122221121985 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, nine hundred eighty-five".