20331112001 has 4 divisors (see below), whose sum is σ = 20333531904. Its totient is φ = 20328692100.

The previous prime is 20331111973. The next prime is 20331112003. The reversal of 20331112001 is 10021113302.

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 a cyclic number.

It is not a de Polignac number, because 20331112001 - 2³⁴ = 3151242817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20331112003) 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, 1197305 + ... + 1214166.

It is an arithmetic number, because the mean of its divisors is an integer number (5083382976).

Almost surely, 2^20331112001 is an apocalyptic number.

It is an amenable number.

20331112001 is a deficient number, since it is larger than the sum of its proper divisors (2419903).

20331112001 is an equidigital number, since it uses as much as digits as its factorization.

20331112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419902.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20331112001 its reverse (10021113302), we get a palindrome (30352225303).

The spelling of 20331112001 in words is "twenty billion, three hundred thirty-one million, one hundred twelve thousand, one".