10201220999 has 4 divisors (see below), whose sum is σ = 10344900240. Its totient is φ = 10057541760.

The previous prime is 10201220993. The next prime is 10201221001. The reversal of 10201220999 is 99902210201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99902210201 = 431 ⋅231791671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10201220999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71839514 + ... + 71839655.

It is an arithmetic number, because the mean of its divisors is an integer number (2586225060).

Almost surely, 2^10201220999 is an apocalyptic number.

10201220999 is a deficient number, since it is larger than the sum of its proper divisors (143679241).

10201220999 is an equidigital number, since it uses as much as digits as its factorization.

10201220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143679240.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 10201220999 in words is "ten billion, two hundred one million, two hundred twenty thousand, nine hundred ninety-nine".