10120851999 has 24 divisors (see below), whose sum is σ = 15397939440. Its totient is φ = 6388167168.

The previous prime is 10120851991. The next prime is 10120852003. The reversal of 10120851999 is 99915802101.

10120851999 is a `hidden beast` number, since 1 + 0 + 120 + 8 + 519 + 9 + 9 = 666.

It is not a de Polignac number, because 10120851999 - 2³ = 10120851991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120851991) 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, 272749 + ... + 307625.

It is an arithmetic number, because the mean of its divisors is an integer number (641580810).

Almost surely, 2^10120851999 is an apocalyptic number.

10120851999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10120851999 is a deficient number, since it is larger than the sum of its proper divisors (5277087441).

10120851999 is a wasteful number, since it uses less digits than its factorization.

10120851999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36599 (or 36596 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 45.

The spelling of 10120851999 in words is "ten billion, one hundred twenty million, eight hundred fifty-one thousand, nine hundred ninety-nine".