10211999999 has 4 divisors (see below), whose sum is σ = 10564137960. Its totient is φ = 9859862040.

The previous prime is 10211999947. The next prime is 10212000031. The reversal of 10211999999 is 99999911201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99999911201 = 76597 ⋅1305533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211999999 is a prime.

It is a Duffinian number.

10211999999 is a modest number, since divided by 999999 gives 10211 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211999899) 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, 176068937 + ... + 176068994.

It is an arithmetic number, because the mean of its divisors is an integer number (2641034490).

Almost surely, 2^10211999999 is an apocalyptic number.

10211999999 is a deficient number, since it is larger than the sum of its proper divisors (352137961).

10211999999 is an equidigital number, since it uses as much as digits as its factorization.

10211999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352137960.

The product of its (nonzero) digits is 1062882, while the sum is 59.

The spelling of 10211999999 in words is "ten billion, two hundred eleven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".