20011002012099 has 96 divisors (see below), whose sum is σ = 33430585144320. Its totient is φ = 11298130511616.

The previous prime is 20011002012091. The next prime is 20011002012101. The reversal of 20011002012099 is 99021020011002.

It is not a de Polignac number, because 20011002012099 - 2³ = 20011002012091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011002012091) 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, 9862493817 + ... + 9862495845.

It is an arithmetic number, because the mean of its divisors is an integer number (348235261920).

Almost surely, 2^{20011002012099} is an apocalyptic number.

20011002012099 is a deficient number, since it is larger than the sum of its proper divisors (13419583132221).

20011002012099 is a wasteful number, since it uses less digits than its factorization.

20011002012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849 (or 4846 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 20011002012099 in words is "twenty trillion, eleven billion, two million, twelve thousand, ninety-nine".