20112543201 has 4 divisors (see below), whose sum is σ = 26816724272. Its totient is φ = 13408362132.

The previous prime is 20112543173. The next prime is 20112543229. The reversal of 20112543201 is 10234521102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20112543173) and next prime (20112543229).

It is not a de Polignac number, because 20112543201 - 2¹⁷ = 20112412129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112543251) 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, 3352090531 + ... + 3352090536.

It is an arithmetic number, because the mean of its divisors is an integer number (6704181068).

Almost surely, 2^20112543201 is an apocalyptic number.

It is an amenable number.

20112543201 is a deficient number, since it is larger than the sum of its proper divisors (6704181071).

20112543201 is an equidigital number, since it uses as much as digits as its factorization.

20112543201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704181070.

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 20112543201 in words is "twenty billion, one hundred twelve million, five hundred forty-three thousand, two hundred one".