121281622209 has 24 divisors (see below), whose sum is σ = 195176621952. Its totient is φ = 71940095520.

The previous prime is 121281622199. The next prime is 121281622223. The reversal of 121281622209 is 902226182121.

121281622209 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 8 + 1 + 622 + 20 + 9 = 666.

It is not a de Polignac number, because 121281622209 - 2⁵ = 121281622177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121281622229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13027974 + ... + 13037279.

It is an arithmetic number, because the mean of its divisors is an integer number (8132359248).

Almost surely, 2^121281622209 is an apocalyptic number.

It is an amenable number.

121281622209 is a deficient number, since it is larger than the sum of its proper divisors (73894999743).

121281622209 is a wasteful number, since it uses less digits than its factorization.

121281622209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26065317 (or 26065314 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 121281622209 in words is "one hundred twenty-one billion, two hundred eighty-one million, six hundred twenty-two thousand, two hundred nine".