12199009901 has 4 divisors (see below), whose sum is σ = 13137395292. Its totient is φ = 11260624512.

The previous prime is 12199009891. The next prime is 12199009931. The reversal of 12199009901 is 10990099121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1032015625 + 11166994276 = 32125^2 + 105674^2 .

It is a cyclic number.

It is not a de Polignac number, because 12199009901 - 2²² = 12194815597 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 (12199009931) 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, 469192676 + ... + 469192701.

It is an arithmetic number, because the mean of its divisors is an integer number (3284348823).

Almost surely, 2^12199009901 is an apocalyptic number.

It is an amenable number.

12199009901 is a deficient number, since it is larger than the sum of its proper divisors (938385391).

12199009901 is an equidigital number, since it uses as much as digits as its factorization.

12199009901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938385390.

The product of its (nonzero) digits is 13122, while the sum is 41.

The spelling of 12199009901 in words is "twelve billion, one hundred ninety-nine million, nine thousand, nine hundred one".