20112110001 has 8 divisors (see below), whose sum is σ = 29795718560. Its totient is φ = 13408073316.

The previous prime is 20112109999. The next prime is 20112110023. The reversal of 20112110001 is 10001121102.

It is a happy number.

It is not a de Polignac number, because 20112110001 - 2¹ = 20112109999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112110201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372446455 + ... + 372446508.

It is an arithmetic number, because the mean of its divisors is an integer number (3724464820).

Almost surely, 2^20112110001 is an apocalyptic number.

It is an amenable number.

20112110001 is a deficient number, since it is larger than the sum of its proper divisors (9683608559).

20112110001 is an equidigital number, since it uses as much as digits as its factorization.

20112110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744892972 (or 744892966 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20112110001 its reverse (10001121102), we get a palindrome (30113231103).

The spelling of 20112110001 in words is "twenty billion, one hundred twelve million, one hundred ten thousand, one".