20012101099 has 4 divisors (see below), whose sum is σ = 20115790936. Its totient is φ = 19908411264.

The previous prime is 20012101093. The next prime is 20012101103. The reversal of 20012101099 is 99010121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012101099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012101093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51844629 + ... + 51845014.

It is an arithmetic number, because the mean of its divisors is an integer number (5028947734).

Almost surely, 2^20012101099 is an apocalyptic number.

20012101099 is a deficient number, since it is larger than the sum of its proper divisors (103689837).

20012101099 is a wasteful number, since it uses less digits than its factorization.

20012101099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103689836.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 20012101099 in words is "twenty billion, twelve million, one hundred one thousand, ninety-nine".