20121122099 has 8 divisors (see below), whose sum is σ = 21782353152. Its totient is φ = 18476098560.

The previous prime is 20121122059. The next prime is 20121122111. The reversal of 20121122099 is 99022112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121122099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121122059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4049294 + ... + 4054259.

It is an arithmetic number, because the mean of its divisors is an integer number (2722794144).

Almost surely, 2^20121122099 is an apocalyptic number.

20121122099 is a deficient number, since it is larger than the sum of its proper divisors (1661231053).

20121122099 is a wasteful number, since it uses less digits than its factorization.

20121122099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103757.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 20121122099 in words is "twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, ninety-nine".